2025 Spawn Cycles Yama Jama vs 2023 Specialized Riprock 20 Coaster
We can't match sizes for these two: one of them has no stack and reach for the sizes shown.
What changes on the Specialized Riprock 20 Coaster
- Frame stack
- n/a
- One of the bikes has no number for this
- Frame reach
- n/a
- One of the bikes has no number for this
- Wheelbase
- n/a
- One of the bikes has no number for this
- Head angle
- +2.0°
- Steeper: sharper steering
- Chainstays
- +6 mm
- Longer: more planted
The two frames
We can't draw these frames yet. The Spawn Cycles Yama Jama numbers we have for size One Size are missing the reach, stack and wheelbase. The numbers below still compare.
Geometry side by side
| Measurement | Spawn Cycles Yama Jama One Size | Specialized Riprock 20 Coaster 20 | Difference |
|---|---|---|---|
| Head tube angle | 68 | 70° | +2.0° |
| Seat tube angle | 72 | 72° | ±0.0° |
| Chainstay length | 380 | 386mm | +6 mm |
| Head tube length | 110 | 80mm | −30 mm |
| Reach | not listed | 315mm | |
| Stack | not listed | 413mm | |
| BB drop | not listed | 42mm |
Differences are the Specialized Riprock 20 Coaster minus the Spawn Cycles Yama Jama. Full charts: 2025 Spawn Cycles Yama Jama, 2023 Specialized Riprock 20 Coaster.
Where each sits in its class
Spawn Cycles Yama JamaSpecialized Riprock 20 Coaster
Each bike is ranked against the other trail bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Spawn Cycles Yama JamaYama Jama | Specialized Riprock 20 CoasterCoaster |
|---|---|---|
| Frame | Spawn Cycles Yama Jama 24 | not listed |
| Fork | RockShox Reba RL | not listed |
| Shifter | SRAM NX | not listed |
| Derailleur | SRAM NX | not listed |
| Cassette | SRAM PG-1130 | not listed |
| Chain | Taya 11-speed | KMC Z510 |
| Crankset | Brood Bike Co. Styx | not listed |
| Chainring | Brood Narrow Wide | not listed |
| Bottom bracket | sealed external bearing | Specialized Feimin FP-B701 |
| Pedals | Wellgo Platform | not listed |
| Wheelset | Brood TR27 | not listed |
| Tire | Brood Maxtion | Specialized Rhythm Lite |
| Brake | Tektro Auriga Comp | not listed |
| Grips | Brood Tenderiderz | Specialized slip-on |
| Seatpost | Brood Throne | not listed |
| Saddle | Brood Throne | Specialized Kids' Henge |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
