2023 Santa Cruz Chameleon R vs 2025 Giant Fathom
The L is the Giant Fathom size closest to your XL Santa Cruz Chameleon R. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Giant Fathom
Compared with the Santa Cruz Chameleon R in XL, the Giant Fathom in L places the top of the head tube 16 mm lower and 20 mm further back, relative to the bottom bracket. Its wheelbase is 31 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −16 mm
- Lower front end
- Frame reach
- −20 mm
- Shorter frame reach
- Wheelbase
- −31 mm
- Shorter: quicker to change direction
- Head angle
- +1.0°
- Steeper: sharper steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
We can't draw these frames yet. The Santa Cruz Chameleon R numbers we have for size XL are missing the chainstay length. The numbers below still compare.
Geometry side by side
| Measurement | Santa Cruz Chameleon R XL | Giant Fathom L | Difference |
|---|---|---|---|
| Reach | 490 | 470 | −20 mm |
| Stack | 647.3 | 631 | −16 mm |
| Head tube angle | 65.0° | 66 | +1.0° |
| Seat tube angle | 74.6° | 75 | +0.4° |
| Effective top tube | 668.8 | not listed | |
| Wheelbase | 1237.1 | 1206 | −31 mm |
| BB height | 315 | not listed | |
| Standover | 708 | not listed | |
| Seat tube length | 460 | 465 | +5 mm |
| Head tube length | 130 | not listed |
Differences are the Giant Fathom minus the Santa Cruz Chameleon R. Full charts: 2023 Santa Cruz Chameleon R, 2025 Giant Fathom.
Where each sits in its class
Santa Cruz Chameleon RGiant Fathom
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 | Santa Cruz Chameleon RR | Giant Fathom1 |
|---|---|---|
| Fork | Fox 34 Rhythm | Giant Crest 34 |
| Shifter | SRAM NX Eagle | SRAM SX Eagle |
| Derailleur | SRAM NX Eagle | SRAM NX Eagle SX |
| Cassette | SRAM NX Eagle | SRAM PG-1150 SX |
| Chain | SRAM NX Eagle | SRAM SX Eagle |
| Crankset | SRAM Descendant Eagle 148 DUB | SRAM SX Eagle Powerspline |
| Bottom bracket | SRAM DUB 68/73mm Threaded BB | SRAM DUB GX |
| Tire | Maxxis Minion DHF WT, Maxxis Aggressor WT | Maxxis Ardent Race |
| Hub | SRAM MTH 716, SRAM MTH 746 | not listed |
| Rim | Race Face AR Offset 30 | not listed |
| Brake | SRAM Guide T | Shimano MT420, Shimano MT410 |
| Rotor | Avid Centerline | Shimano RT-26 |
| Handlebar | Burgtec RideWide Alloy Bar | Giant Contact SL TR35 |
| Stem | Burgtec Enduro MK3 | Giant Contact SL |
| Headset | Cane Creek 10 IS Integrated Headset | not listed |
| Dropper post | SDG Tellis Dropper | Giant Contact Switch |
| Saddle | WTB Silverado Medium CroMo | Giant Romero |
| Frame | not listed | Giant Fathom |
| Chainring | not listed | SRAM SX Eagle |
| Wheelset | not listed | Giant AM |
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
