2023 Specialized Riprock 20 Coaster vs 2025 Spawn Cycles Yama Jama
We can't match sizes for these two: one of them has no stack and reach for the sizes shown.
What changes on the Spawn Cycles Yama Jama
- 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°
- Slacker: calmer steering
- Chainstays
- −6 mm
- Shorter: livelier
The two frames
We can't draw these frames yet. The Specialized Riprock 20 Coaster numbers we have for size 20 are missing the wheelbase. The numbers below still compare.
Geometry side by side
| Measurement | Specialized Riprock 20 Coaster 20 | Spawn Cycles Yama Jama One Size | Difference |
|---|---|---|---|
| Reach | 315mm | not listed | |
| Stack | 413mm | not listed | |
| Head tube angle | 70° | 68 | −2.0° |
| Seat tube angle | 72° | 72 | ±0.0° |
| Chainstay length | 386mm | 380 | −6 mm |
| BB drop | 42mm | not listed | |
| Head tube length | 80mm | 110 | +30 mm |
Differences are the Spawn Cycles Yama Jama minus the Specialized Riprock 20 Coaster. Full charts: 2023 Specialized Riprock 20 Coaster, 2025 Spawn Cycles Yama Jama.
Where each sits in its class
Specialized Riprock 20 CoasterSpawn Cycles Yama Jama
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 | Specialized Riprock 20 CoasterCoaster | Spawn Cycles Yama JamaYama Jama |
|---|---|---|
| Chain | KMC Z510 | Taya 11-speed |
| Bottom bracket | Specialized Feimin FP-B701 | sealed external bearing |
| Tire | Specialized Rhythm Lite | Brood Maxtion |
| Grips | Specialized slip-on | Brood Tenderiderz |
| Saddle | Specialized Kids' Henge | Brood Throne |
| Frame | not listed | Spawn Cycles Yama Jama 24 |
| Fork | not listed | RockShox Reba RL |
| Shifter | not listed | SRAM NX |
| Derailleur | not listed | SRAM NX |
| Cassette | not listed | SRAM PG-1130 |
| Crankset | not listed | Brood Bike Co. Styx |
| Chainring | not listed | Brood Narrow Wide |
| Pedals | not listed | Wellgo Platform |
| Wheelset | not listed | Brood TR27 |
| Brake | not listed | Tektro Auriga Comp |
| Seatpost | not listed | Brood Throne |
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