
SRAM GX Eagle Transmission 12-Speed Chain Silver, 126 link
126 link
Velopedia Bicycle Archive
Original specifications: 29″ front / 27.5″ rear wheels · 49.4lbs / 22.41kg published weight · geometry for 5 published sizes.
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At a glance
| Frame Construction | Carbon C MX 170mm Travel, 4-Bar |
|---|---|
| Frame Material | Carbon Fiber |
| Fork | Fox 38 Float Performance Elite, Grip X2, 170mm |
| Rear Shock | FOX Float X Performance Elite, 205x65 |
| Shifters | SRAM AXS Pod Bridge |
|---|---|
| Rear Derailleur | SRAM GX Eagle AXS T-Type, 12spd |
| Crankset | SRAM GX Eagle Cranks All Sizes: 155mm |
| Cassette | SRAM XS 1275 Eagle T-Type, 10-52t |
| Chain | SRAM GX Eagle T-Type, Flattop, 12spd |
| Brakes | SRAM Maven Bronze |
|---|
| Headset | Cane Creek 50 IS Integrated Headset |
|---|---|
| Handlebar | OneUp Aluminum Bar S: 35x800mm, 20mm Rise, M/L/XL/XXL: 35x800mm, 35mm Rise |
| Stem | OneUp Enduro Stem All Sizes: 42mm |
| Saddle | SDG Bel-Air V3 Max Lux-Alloy Atmos |
| Seatpost | OneUp Dropper Post, 31.6 S: 120mm, M: 180mm, L: 210mm, XL/XXL: 240mm |
| Hubs | (F) E13 SL, 15x110, 6-Bolt, 32h / (R) E13 SL E-Spec, 12x148, XD, 6-Bolt, 32h |
|---|---|
| Rims | (F) Reserve 30|HD AL 6069 / (R) Reserve 30|HD AL 6069 |
| Front Tire | Maxxis Assegai 29"x2.5", 3C, MaxxGrip, Double Down |
| Rear Tire | Maxxis Minion DHRII 27.5"x2.5", 3C MaxxTerra, DoubleDown |
| Wheel Size | Mx |
Frame measurements by size.
Published frame view
Select an available measurement to locate it on the frame.
| Measurement | S | M | L | XL | XXL |
|---|---|---|---|---|---|
| Seat tube | 380 mm | 400 mm | 420 mm | 460 mm | 500 mm |
| Top tube | 571 mm | 596 mm | 617 mm | 640 mm | 670 mm |
| Head tube | 100 mm | 110 mm | 120 mm | 135 mm | 155 mm |
| Head-tube angle | 63.6/63.3 | 63.6/63.3 | 63.6/63.3 | 63.6/63.3 | 63.6/63.3 |
| Seat-tube angle | 78.6/78.3 | 78.7/78.4 | 78.7/78.4 | 78.7/78.4 | 78.6/78.3 |
| Chainstay / rear center | 440 mm | 443 mm | 446 mm | 449 mm | 452 mm |
| Wheelbase | 1220 mm | 1252 mm | 1280 mm | 1309 mm | 1346 mm |
| Bottom-bracket drop | 27/31 | 27/31 | 27/31 | 27/31 | 27/31 |
| Bottom-bracket height | 346/342 | 346/342 | 346/342 | 346/342 | 346/342 |
| Reach | 435/432 | 460/457 | 480/477 | 500/497 | 525/522 |
| Stack | 622/625 | 631/635 | 640/643 | 654/656 | 670/674 |
| Standover height | 745/740 | 739/735 | 738/733 | 738/733 | 735/730 |
| Front center | 780 mm | 809 mm | 834 mm | 860 mm | 894 mm |
Measurements may vary by configuration, wheel size, or frame setting where noted in the published chart.
Parts & serviceability

126 link

10-52t

29x2.5
Replacement option · verify fit

27.5x2.5
Replacement option · verify fit

52T Max
Based on the original build. Confirm the model, size and fit before ordering; installed parts may differ. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases.
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Archived: 2026 Santa Cruz Bullit GX AXS · Electric-assist · Published sizes: S, M, L, XL, XXL
Archived: Frame: Carbon C MX 170mm Travel, 4-Bar · Fork: Fox 38 Float Performance Elite, Grip X2, 170mm
Archived: Fork: Fox 38 Float Performance Elite, Grip X2, 170mm · Rear shock: FOX Float X Performance Elite, 205x65
Archived: Shifters: SRAM AXS Pod Bridge · Rear derailleur: SRAM GX Eagle AXS T-Type, 12spd · Crankset: SRAM GX Eagle Cranks All Sizes: 155mm · Cassette: SRAM XS 1275 Eagle T-Type, 10-52t · Chain: SRAM GX Eagle T-Type, Flattop, 12spd
Archived: Brakes: SRAM Maven Bronze
Archived: Wheel size: MX · Rims: (F) Reserve 30|HD AL 6069 / (R) Reserve 30|HD AL 6069 · Hubs: (F) E13 SL, 15x110, 6-Bolt, 32h / (R) E13 SL E-Spec, 12x148, XD, 6-Bolt, 32h · Front tire: Maxxis Assegai 29"x2.5", 3C, MaxxGrip, Double Down · Rear tire: Maxxis Minion DHRII 27.5"x2.5", 3C MaxxTerra, DoubleDown
Archived: Headset: Cane Creek 50 IS Integrated Headset · Handlebar: OneUp Aluminum Bar S: 35x800mm, 20mm Rise, M/L/XL/XXL: 35x800mm, 35mm Rise · Stem: OneUp Enduro Stem All Sizes: 42mm · Seatpost: OneUp Dropper Post, 31.6 S: 120mm, M: 180mm, L: 210mm, XL/XXL: 240mm · Saddle: SDG Bel-Air V3 Max Lux-Alloy Atmos
Archived: Santa Cruz Bullit GX AXS · electric-assist identification
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.