OG4A Yellow
$529.00
Wildcat Mini BMX Bike OG4A Yellow
The OG4A is built for riders who want more time riding and less time fixing bikes.
This bike brings features no other Mini BMX offers.
Strong. Fast. Light. They stand out and are ready for the skate park or BMX track.
If your child rides hard and wants to progress, this is the bike that keeps up.
Recommended for riders up to 175lb.
Why choose the Wildcat Mini BMX OG4A
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The only Mini BMX in the world with disc brakes
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Lighter wheels than traditional cart-style setups
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Strong components designed for jumps and park riding
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Built to handle real use, not just cruising
-
This is not a toy bike.
It is a performance Mini BMX.
Built to ride hard
The OG4A is designed for skate parks, pump tracks, and BMX tracks.
Key features include:
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Cro-Moly handlebars for strength and control
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One-piece heat-forged crank for durability
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High-pressure tyre for speed and grip
-
CNC aluminium hubs with fibre-infused nylon cross-wheel rims
The result is a bike that feels solid under pressure and responsive in the air.
Lighter where it matters
Most Mini BMX bikes use heavy cart wheels.
That weight slows riders down and limits progression.
Wildcat wheels remove unnecessary weight without sacrificing strength.
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Faster acceleration
-
Easier handling
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Better control for younger riders
Your child will feel the difference on the first ride.
Gearing that works
Every Wildcat Mini BMX uses the custom 9-tooth Wildcat cassette hub.
This delivers:
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Smooth power transfer
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Fast and precise engagement
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A loud, confident sound kids love
The gearing is tuned for park and track riding, not casual pedalling.
Rider weight guidance
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Recommended rider weight up to 175lb
-
Tested successfully up to 220lbs
For riders over 175lbs who ride aggressively, choose a model with a 3-piece crank.
Where it can be used
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Skate parks
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BMX tracks
-
Competition use
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Local Parks
- Around home
Road use requires a bell and reflectors.
Shipping
Free Shipping to contiguous USA
- ◄ Specifications
-
Axle: 10mm, chromoly steel, CNC
BB: USA type
Brake: Removable disc brake
Chain: Traditional KMC Z410
Chain wheel: 28T Forged Aluminium
Crank: One Piece heated forged hi-ten steel arms. Ball retainer L=89mm
Driver: Cassette 9T, full CNC
Frame: Hi-ten steel, casting dropout
Fork: Threadless, tapered legs, 10pcs head parts
Handlebars: 2 piece small size (650x200mm / 720g) 4130 chromoly steel
Rims: No 100A model, integrated cross wheel, Nylon rim + CNC Aluminium core
Seat: Pivotal, Kevlar coated, anodised aluminium seat post
Stem: Premium 6061 aluminium, Top load
Top tube: 13.27"
Seat tube: 7.3"
Tyre: Pro street, 45 psi, 10"
Weight rating: 175lb (tested to 220lb) on 1 piece crank bikes (265lb on 3 piece cranks)
Weight: 8.7kg (including brake)
- ◄Support
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Assembly Instructions
Download instructions here
Bikes are 80% assembled.
Required tools for assembly: 4, 5 & 6mm Allen key for seat and handle bars, 15mm spanner for pedals
Warranty
12 months warranty on components and a limited lifetime warranty on the frame, you can shred with peace of mind.
Spare parts available separately.
Limited Lifetime Warranty on Frame
12 Month Warranty on parts - See Warranty section for full details and maintenance
| Compare | OG3A | OG3 Pro Series | P30 | Lynx 16" BMX |
|---|---|---|---|---|
| Brakes | Disc Brakes | Disc Brakes | Disc Brakes with Gyro kit | 6061 aluminum U brake |
| Weight Rating* | 175lbs | 265lbs | 265lbs | N/A |
| Handle bars | 2 piece 4130 Chromoly | 4 piece 6061 Aluminum | 4 piece 6061 Aluminum | 4 piece 6061 Aluminum |
| Handle bar size | Small | Medium | Medium | Medium |
| Frame | Hi-ten steel | Hi-ten steel | Full 4130 Chromoly | Full 4130 Chromoly |
| Tires | Pro-Street, Pattern T04 | Pro-Street, Pattern T04 | Pro-Street, Pattern T04 | Pro-Street 16"x2.25 |
| Crank | One Piece hi-ten steel arms | 3 piece 4130 Chromoly | 3 piece 4130 Chromoly | 3 piece 4130 Chromoly |
| Stem | Premium 6061 Aluminum Top Load | Premium 6061 Aluminum Top Load | Premium 6061 Aluminum Top Load | Premium 6061 Aluminum Top Load |
| Head parts | Standard cup | Fully sealed bearings | Fully sealed bearings | Fully sealed bearings |
| Seat | One Piece FAT type | Pivotal | Pivotal | Pivotal |
| Chain | Traditional KMC Z410 | Traditional KMC Z410 | Traditional KMC Z410 or Half Link | Half link |
| Sprocket | 28t Hi-ten Steel | 28t forged aluminum | 28t forged aluminum | Guarded 25t, 7075 aluminum |
| Wheel | Cross Wheel ABS/Aluminum | Turbo Wheel Nylon/Aluminum | Turbo Wheel Nylon/Aluminum | Aluminum, 16x28H, double walled | * Tested on riders up to weight rating |
K
My 4 year old is stoked with his new "Big kids Trick BMX".. I was looking for a bike he can go from the skate park to the race track and stumbled across wildcat bikes! I ordered this the week before Christmas and the team went above and beyond to get it to us in time. Not only is the product of exceptional quality but the team behind it all implement the same standards with their customer service. Thanks again guys!
Kiera, thank you so much for that wonderful feedback. We are stoked that your 4 yr old absolutely loves his Wildcat and you got the bike in time for Christmas. It's honestly why we started the business - our own boys wanted one so much and we wanted to make sure we could put smiles on other kids faces. We hope you have many years of fun whilst creating the next Nitro Circus superstar!! 😸
J
My son is absolutely in love with his bmx. I do look forward to ordering again soon.
That's so good to hear Jessica - thanks for joining the Wildcat Pride. Look forward to seeing your boy sending it soon!!
S
We got this bike for our sons 4th birthday he absolutely loves it! His first time riding with no training wheels and he had no trouble at all would definitely recommend!
That's awesome Sharni - what a champion.
A
Great bike
Hi Chris! We're thrilled to hear you love the OG4A Green. Thanks for sharing your positive feedback!
O
Amazing
So pleased you’re happy with the OG4A bike Owen. Hope it brings years of fun and memories.
o
Slightly damaged but crafted very well over all
Sorry for the damage but glad we were able to sort things for you.
A
My 10 year old grandson was stoked only kid in town with one. Only fallen off twice doing tricks
Hi Sue! That’s awesome to hear your grandson is enjoying the OG4A Yellow. Thanks for sharing his excitement and glad he's staying safe with only a couple of falls. Happy riding!
H
Very happy with the product and service
Thank you Harley - so pleased you are happy with your Royal Green Wildcat. They are our best seller!! Would love to encourage you to tag us at #wildcatbikes in any social media posts you make. Hope whoever gets to ride it has an incredible time.
P
I bought the bike 20 minutes after my son was riding it the centre kog broke
Tried to put it back together but the thread is to damage
Sent you photos and ask for a refund but you said you would send another centre kog
It's been nearly 6 weeks when I paid for this bike and still can't use it
Made a huge mistake in buying this bike
Would not recommend any person to buy from this store with the service I have had
You said you would send a email confirming delivery of New part's
Still waiting for your email but you can send a email asking how I feel
Paul, as discussed with you, we are sorry that you didn't double check that all the parts, including the crank was tight before it was used, and then that you cross threaded the crank when reinstalling it. We include these instructions in all of our post purchase emails, in the instruction booklet and on the box. We are however very disappointed that you left a one star review considering we sent you a brand new one piece crank, at our cost, despite it not being a warranty issue. We receievd confirmation that you receieved the one piece crank which was sent directly from the factory to you. I'm sorry that you feel disappointed in your purchase but we went above and beyond to get your boy back on his Wildcat. We hope he has many hours of fun riding his Wildcat.
P
If you’re even thinking about getting the Mini Rocker Bike for your little legend DO IT. My son is absolutely OBSESSED with his. From the moment we unboxed it, it was game over for every other ride on, gadet or device! This thing is sleek, sturdy and cool as anything.
Wildcats, you’ve absolutely nailed it with this one. 10/10 would recommend to anyone with an adventure-chasing, mini daredevil at home - and theres no concerns with safety.
That is the best feedback Pamela, thank you for sharing. We aim for kids to be obsessed with their Mini Rockers - so it means the world to hear that your boy is loving it. We hope he has many hours of fun and excitement on his Wildcat.
V
EXCELLENT PRODUCT AND GREAT SERVICE. MY 11 YEAR OLD GRAND DAUGHTER LOVES HER NEW BIKE. AFTERCARE CUSTOMER SERVICE EXCELLENT. 5 STARS TO THE TEAM AT WILDCAT.
Thank you for the incredible feedback Vanessa, we love hearing it and stoked that your granddaughter is loving her Wildcat Mini Rocker.
J
My 5yr old son absolutely loves it, and so did his big brothers in definitely would recommend wildcat.
Cant say there is anything to dislike
Massively appreciate the feedback Jayden/Gracie - I hope his big brothers get to have their one one day. And that you might get to have a ride as well.
J
My son absolutely loves his bike.
That’s awesome to hear - hope he spends many hours sending it over the holidays.
T
Great quality and one happy kid.
So good to hear Tyron, appreciate the excellent feedback.
B
Awesome quality, my son loves it . Built well, can’t fault it
Thank you for your great feedback Brigette - hope he gets a lot of use out of it and really develops his skill set in sending it on a BMX. Don't forget to have a go yourself!!!
A
Great product
Thanks for the great feedback.
K
Fast shipping amazing bike worth every cent
Thank you for the awesome feedback Kylie. Glad you're loving the Wildcat.
D
Amazing service ordered on Monday delivered on Thursday interstate . My 10y grandson is the king of the park. Already inspired others to buy. Thank you Wildcat.
That’s brilliant to hear Andrew - I can only imagine the attention he’s getting. Hope there’s many years of memories that you build with him and his Wildcat.
J
Awesome service, great Quilty! Thankyou so much 10/10 and iv recommend them
Tha is for the great feedback James - we always appreciate a very happy customer. Hope it gives you lots of memories and great experiences.
S
Have had issues with the seat being too reclined back & the young man is falling off …
Sorry to hear Steve. To keep the costs down on the OG3A’s most of them do have a fixed position for the seat which is generally ok for people but if he’s having trouble with it, we do have some pivotal seats in our Parts section whereby ou can adjust the angle of the seat.
R
I got 1 for my 8 year old son’s bday 1 week ago took him skate park on the weekend now I can’t get him off it he loves it now everyday it’s worth it
B
Great little stunt bike.
R
My son loves this bike, quality is amazing awesome colour, his friends all want one now, fast delivery
That's brilliant to hear Rachael - it's normally the case - all their friends want to ride one as well. Santa is always busy!!
J
Little man loves tearing it up, on and off the track. Good quality bike and amazing customer service.
Thanks for the feedback Josh - we appreciate it so much. Glad the little man is out there tearing it up.
A
Easy website to view and place order. Continuous communication on updates on when our mini rocker was sent. It was the perfect item for my son and he is over the moon.
That's brilliant to hear Amanda. So glad that he's loving it.
J
Great little bike. My son can not stay off it and takes it along wherever we go. Just super fun.
M
Have now bought 5 mini bikes from you in the past few years for my grandchildren and they have loved them… great bikes,great fun and great service … ordered the bikes and received them within a week..very happy customer.. Thankyou
That is amazing Michelle - you have some very lucky Grandkids - I am sure you get a lot of enjoyment seeing them have so much fun on their Wildcats.
A
My son absolutely loves it😀😀
So good to hear Amanda. I hope he has hours and hours of fun on it.
You may also like
K
My 4 year old is stoked with his new "Big kids Trick BMX".. I was looking for a bike he can go from the skate park to the race track and stumbled across wildcat bikes! I ordered this the week before Christmas and the team went above and beyond to get it to us in time. Not only is the product of exceptional quality but the team behind it all implement the same standards with their customer service. Thanks again guys!
Kiera, thank you so much for that wonderful feedback. We are stoked that your 4 yr old absolutely loves his Wildcat and you got the bike in time for Christmas. It's honestly why we started the business - our own boys wanted one so much and we wanted to make sure we could put smiles on other kids faces. We hope you have many years of fun whilst creating the next Nitro Circus superstar!! 😸
J
My son is absolutely in love with his bmx. I do look forward to ordering again soon.
That's so good to hear Jessica - thanks for joining the Wildcat Pride. Look forward to seeing your boy sending it soon!!
S
We got this bike for our sons 4th birthday he absolutely loves it! His first time riding with no training wheels and he had no trouble at all would definitely recommend!
That's awesome Sharni - what a champion.
A
Great bike
Hi Chris! We're thrilled to hear you love the OG4A Green. Thanks for sharing your positive feedback!
O
Amazing
So pleased you’re happy with the OG4A bike Owen. Hope it brings years of fun and memories.
o
Slightly damaged but crafted very well over all
Sorry for the damage but glad we were able to sort things for you.
A
My 10 year old grandson was stoked only kid in town with one. Only fallen off twice doing tricks
Hi Sue! That’s awesome to hear your grandson is enjoying the OG4A Yellow. Thanks for sharing his excitement and glad he's staying safe with only a couple of falls. Happy riding!
H
Very happy with the product and service
Thank you Harley - so pleased you are happy with your Royal Green Wildcat. They are our best seller!! Would love to encourage you to tag us at #wildcatbikes in any social media posts you make. Hope whoever gets to ride it has an incredible time.
P
I bought the bike 20 minutes after my son was riding it the centre kog broke
Tried to put it back together but the thread is to damage
Sent you photos and ask for a refund but you said you would send another centre kog
It's been nearly 6 weeks when I paid for this bike and still can't use it
Made a huge mistake in buying this bike
Would not recommend any person to buy from this store with the service I have had
You said you would send a email confirming delivery of New part's
Still waiting for your email but you can send a email asking how I feel
Paul, as discussed with you, we are sorry that you didn't double check that all the parts, including the crank was tight before it was used, and then that you cross threaded the crank when reinstalling it. We include these instructions in all of our post purchase emails, in the instruction booklet and on the box. We are however very disappointed that you left a one star review considering we sent you a brand new one piece crank, at our cost, despite it not being a warranty issue. We receievd confirmation that you receieved the one piece crank which was sent directly from the factory to you. I'm sorry that you feel disappointed in your purchase but we went above and beyond to get your boy back on his Wildcat. We hope he has many hours of fun riding his Wildcat.
P
If you’re even thinking about getting the Mini Rocker Bike for your little legend DO IT. My son is absolutely OBSESSED with his. From the moment we unboxed it, it was game over for every other ride on, gadet or device! This thing is sleek, sturdy and cool as anything.
Wildcats, you’ve absolutely nailed it with this one. 10/10 would recommend to anyone with an adventure-chasing, mini daredevil at home - and theres no concerns with safety.
That is the best feedback Pamela, thank you for sharing. We aim for kids to be obsessed with their Mini Rockers - so it means the world to hear that your boy is loving it. We hope he has many hours of fun and excitement on his Wildcat.
V
EXCELLENT PRODUCT AND GREAT SERVICE. MY 11 YEAR OLD GRAND DAUGHTER LOVES HER NEW BIKE. AFTERCARE CUSTOMER SERVICE EXCELLENT. 5 STARS TO THE TEAM AT WILDCAT.
Thank you for the incredible feedback Vanessa, we love hearing it and stoked that your granddaughter is loving her Wildcat Mini Rocker.
J
My 5yr old son absolutely loves it, and so did his big brothers in definitely would recommend wildcat.
Cant say there is anything to dislike
Massively appreciate the feedback Jayden/Gracie - I hope his big brothers get to have their one one day. And that you might get to have a ride as well.
J
My son absolutely loves his bike.
That’s awesome to hear - hope he spends many hours sending it over the holidays.
T
Great quality and one happy kid.
So good to hear Tyron, appreciate the excellent feedback.
B
Awesome quality, my son loves it . Built well, can’t fault it
Thank you for your great feedback Brigette - hope he gets a lot of use out of it and really develops his skill set in sending it on a BMX. Don't forget to have a go yourself!!!
A
Great product
Thanks for the great feedback.
K
Fast shipping amazing bike worth every cent
Thank you for the awesome feedback Kylie. Glad you're loving the Wildcat.
D
Amazing service ordered on Monday delivered on Thursday interstate . My 10y grandson is the king of the park. Already inspired others to buy. Thank you Wildcat.
That’s brilliant to hear Andrew - I can only imagine the attention he’s getting. Hope there’s many years of memories that you build with him and his Wildcat.
J
Awesome service, great Quilty! Thankyou so much 10/10 and iv recommend them
Tha is for the great feedback James - we always appreciate a very happy customer. Hope it gives you lots of memories and great experiences.
S
Have had issues with the seat being too reclined back & the young man is falling off …
Sorry to hear Steve. To keep the costs down on the OG3A’s most of them do have a fixed position for the seat which is generally ok for people but if he’s having trouble with it, we do have some pivotal seats in our Parts section whereby ou can adjust the angle of the seat.
R
I got 1 for my 8 year old son’s bday 1 week ago took him skate park on the weekend now I can’t get him off it he loves it now everyday it’s worth it
B
Great little stunt bike.
R
My son loves this bike, quality is amazing awesome colour, his friends all want one now, fast delivery
That's brilliant to hear Rachael - it's normally the case - all their friends want to ride one as well. Santa is always busy!!
J
Little man loves tearing it up, on and off the track. Good quality bike and amazing customer service.
Thanks for the feedback Josh - we appreciate it so much. Glad the little man is out there tearing it up.
A
Easy website to view and place order. Continuous communication on updates on when our mini rocker was sent. It was the perfect item for my son and he is over the moon.
That's brilliant to hear Amanda. So glad that he's loving it.
J
Great little bike. My son can not stay off it and takes it along wherever we go. Just super fun.
M
Have now bought 5 mini bikes from you in the past few years for my grandchildren and they have loved them… great bikes,great fun and great service … ordered the bikes and received them within a week..very happy customer.. Thankyou
That is amazing Michelle - you have some very lucky Grandkids - I am sure you get a lot of enjoyment seeing them have so much fun on their Wildcats.
A
My son absolutely loves it😀😀
So good to hear Amanda. I hope he has hours and hours of fun on it.