Description
MAFIABIKES BOMMA 29 STEEL
The bike that helped start a movement is back.
The all-new Bomma 29 stays true to the original formula that made it a favourite in the culture, but now comes upgraded where it matters most. We’ve fitted a powerful Shimano MT200 hydraulic rear brake for improved control at balance point, switched to a freewheel rear hub for
ease of upgrades and added integrated peg mounts to the rear dropouts so you can push combos without damaging rear axles!
Built around the same proven steel frame and wheelie-specific geometry, the Bomma steel delivers a huge balance point, predictable handling and the durability to take daily street abuse.
Whether you’re learning your first wheelies or smashing combos like a pro, this is a bike designed by riders who live the culture and know exactly what you need.
Geometry
| (A) Top tube length | 605MM |
|---|---|
| (B) Head tube length | 105MM |
| (C) Standover | 773mm |
| (D) Reach | 439MM |
| (E) Stack height | 583MM |
| (F) Bottom Bracket | 312.5mm |
Specifications
| Frame | Bomma 29 2026 High Tensile single speed |
|---|---|
| Forks | Bomma 29 |
| Handlebars | Bomma 2 piece W762mm x H168mm |
| Grips | Mafia 2026 Mushroom grip |
| Headset | 1 1/8” External – Unsealed bearings |
| Stem | Mafiabikes 2026 forged topload – 50mm reach |
| Pedals | Mafia bike plastic pedals |
| Saddle | Mafiabikes Wheelie seat – Railed |
| Seatpost | Ø25.4mm micro adjust alloy |
| Seat Clamp | Ø28.6mm External QR |
| Cranks | 170mm 4130 chromoly 19mm 8 spline heat treated |
| Chainring/sprocket front | 32t Steel Sprocket, BMX Fitment |
| Sprocket/cassette rear | 16t Freewheel M30 x 1mm |
| Tyre Front | Lagos Snakeskin "S" Super Soft Compound 27.5" x 2.5" |
| Tyre Rear | Lagos Snakeskin "S" Super Soft Compound 27.5" x 2.5" |
| Sprocket | 32t Steel sprocket |
| Front hub | Alloy shell, 3/8" axle, sealed bearings |
| Rear hub | Alloy shell, 3/8" axle, Threaded Freewheel, Fully sealed bearings, Disco |
| Rim front | 27.5" 30mm Mafia 2026 Wide low profile double wall alloy 36h |
| Rim rear | 27.5" 30mm Mafia 2026 Wide low profile double wall alloy 36h |
| Brake Front | Side pull cable brake (supplied in roadkit) |
| Brake Rear | Shimano – hydraulic disc brake 160mm rotor |
Tech Details
| Weight (lbs) | 35 |
|---|---|
| BB type | 73mm ISO Thread |
| Headset type | 1 1/8” external |
| Rear axle/hub spacing | 135mm |
| Max tyre width rear | 66mm / 2.6" |
| Seatpost/seatclamp | Ø25.4mm post Ø28.6 seatclamp |
| Front axle/hub spacing | 100mm |
| Frame construction and details | High tensile steel single speed frame, peg mount integrated dropouts, threaded BB |
| Road kit | Included |
Note: Named "Bomma 29" by Mafia, but the US spec sheet lists 27.5" rims and 27.5" x 2.5" tyres. Wheel Size set to 27.5" per spec sheet
Available to order: 29ers Bike Shop is an authorized Mafia Bikes dealer. This bike is ordered in for you – contact us for current lead time.
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