Extention Heimdall street-trials bike
Entry level street-trials bike from new brand Extention, the Heimdall features a 15mm thru-axle and an internally routed front brake hose - features not found on any other bike at this price point. Horizontal dropouts are coupled with excellent chain tugs and massive M10 bolts - an important addition to firmly secure the rear wheel.
Worldwide shipping. Dispatches in 24 hours
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30 day return policy (limitations may apply)
Outgoing Heimdall custom build. Please read through the description for details as this bike differs slightly from the one pictured.
✅ Custom Trialshop.pl upgrade - uprated Sapim spokes
This bike delivers to the EU in 2-4 days. Shipping starts at just €19. Check the delivery tab for details.
Frame and fork:
- Extention Heimdall 2022 disc frame, gloss black
- Extention Heimdall 1 1/8", 15mm thru-axle, disc fork, 2023 pewter (please note that the colour of this fork is visibly different to the frame and has a dark pewter metallic finish as found on 2023 Heimdall bikes (last image pictures the fork colour))
Steering:
- Extention Forged, 90mm x 35*
- Extention 6061 reinforced tripple butted high riser bars (not pictured, 2025 model)
- Extention sealed headset
- Rubber grips
Drive:
- Extention Forged 7050-T6 BB24 crankset (not pictured, 2025 model)
- Extention 22T bash, 22T sprocket secured by 4 bolts
- Extention 108.9 16T freewheel
- Shanmashi platform nylon pedals
- KMC chain
- Extention steel chain tugs
Front wheel:
- Extention 15mm hub, disc
- MT disc rim, double wall
- Sapim spokes
- Sapim Polyax brass nipples
- Kenda Kiniption 2.3" tyre
- Kenda tube
Rear wheel:
- Extention 135mm hub, 10mm bolts
- MT disc rim, double wall
- Sapim spokes
- Sapim Polyax brass nipples
- Kenda Kiniption 2.3" tyre
- Kenda tube
Brakes:
- Sold brakeless (no adaptors, rotors, levers, calipers)
Weight:
- 10.52kg (when equipped with Magura MT5 brakes)
1137
New
Additional info
- Warranty
- 6 months
- Wheelbase
- 965mm
- BB rise
- 15mm
- Chainstays
- 362mm
- Head tube angle
- 74*
- Reach
- 665mm
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Entry level street-trials bike from new brand Extention, the Heimdall features a 15mm thru-axle and an internally routed front brake hose - features not found on any other bike at this price point. Horizontal dropouts are coupled with excellent chain tugs and massive M10 bolts - an important addition to firmly secure the rear wheel.
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