
SRAM GX Eagle 12-Speed Chain Silver, 126 links
126 links
Velopedia Bicycle Archive
Original specifications: 29″ front / 27.5″ rear wheels · 43.57 lbs / 19.76 kg published weight · geometry for 5 published sizes.
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At a glance
| Frame Construction | Carbon C Frame |
|---|---|
| Frame Material | Carbon Fiber |
| Fork | FOX 36 Float Performance, Grip, 160mm |
| Rear Shock | Fox Float X Performance, 210x55 -or- RockShox Super Deluxe Select+, 210x55 |
| Shifters | SRAM GX Eagle Single Click, 12spd |
|---|---|
| Rear Derailleur | SRAM GX Eagle, 12spd |
| Crankset | E13 Helix eSpec, 165mm |
| Cassette | SRAM XG1275 Eagle, 12spd, 10-50t |
| Chain | SRAM GX Eagle, 12spd |
| Brakes | SRAM Maven Bronze Stealth |
|---|
| Headset | FSA IS-2/47/42 ACB -or- Cane Creek 10 IS Integrated Headset |
|---|---|
| Handlebar | OneUp Aluminum Bar, 35mm Rise, 800mm |
| Stem | Burgtec Enduro MK3, 42mm |
| Saddle | SDG Bel-Air V3, Max Lux-Alloy -or- WTB Volt |
| Seatpost | OneUp Dropper Post, 31.6 |
| Hubs | (F) E13 SL, 15x110, 6-Bolt, 32h / (R) E13 SL E-Spec, 12x148, XD, 6-Bolt, 32h |
|---|---|
| Rims | (F) Reserve 30|HD AL / (R) Reserve 30|HD AL |
| Front Tire | Schwalbe Albert, 29x2.5, Trail Radial Ultra Soft |
| Rear Tire | Schwalbe Albert, 27.5x2.5, Trail Radial Soft |
| Wheel Size | Mx |
Frame measurements by size.
Frame diagram
Select an available measurement to locate it on the frame.
| Measurement | S | M | L | XL | XXL |
|---|---|---|---|---|---|
| Seat tube | 380/380 | 405/405 | 430/430 | 460/460 | 500/500 |
| Top tube | 569.2/579.6 | 602.7/602.9 | 620.6/621.5 | 641.8/642.7 | 669.1/670 |
| Head tube | 100 mm | 110 mm | 120 mm | 140 mm | 155 mm |
| Head-tube angle | 64.3/64 | 64.3/64 | 64.3/64 | 64.3/64 | 64.3/64 |
| Seat-tube angle | 76.8/76.6 | 77.1/76.9 | 77.5/77.2 | 77.7/77.5 | 77.8/77.5 |
| Chainstay / rear center | 443/443.8 | 443/443.8 | 443/443.8 | 446/446.8 | 450/450.7 |
| Wheelbase | 1209.1/1209.7 | 1238.4/1239.1 | 1262.7/1263.4 | 1294.4/1295.1 | 1329.9/1330.5 |
| Bottom-bracket drop | 28.5/31.8 | 28.5/31.8 | 28.5/31.8 | 28.5/31.8 | 28.5/31.8 |
| Bottom-bracket height | 344/340.7 | 344/340.7 | 344/340.7 | 344/340.7 | 344/340.7 |
| Reach | 435/432.4 | 460/457.4 | 480/477.5 | 500/497.4 | 525/522.5 |
| Stack | 614.9/616.8 | 624/625.8 | 633/634.9 | 651/653 | 664.5/666.5 |
| Standover height | 720.1/716.2 | 733/728.8 | 733.4/729.3 | 731.7/731.6 | 741/738.6 |
| Front center | 766.1/765.9 | 795.4/795.3 | 819.7/819.6 | 848.4/848.3 | 879.9/879.8 |
Dimensions as recorded.
Parts & serviceability

126 links

10-50t

29x2.5in
Replacement option · verify fit

27.5x2.5in
Replacement option · verify fit

31.6x240mm Travel
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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: 2025 Santa Cruz Heckler SL S · Electric-assist · Published sizes: S, M, L, XL, XXL
Archived: Frame: Carbon C Frame · Fork: FOX 36 Float Performance, Grip, 160mm
Archived: Fork: FOX 36 Float Performance, Grip, 160mm · Rear shock: Fox Float X Performance, 210x55 -or- RockShox Super Deluxe Select+, 210x55
Archived: Shifters: SRAM GX Eagle Single Click, 12spd · Rear derailleur: SRAM GX Eagle, 12spd · Crankset: E13 Helix eSpec, 165mm · Cassette: SRAM XG1275 Eagle, 12spd, 10-50t · Chain: SRAM GX Eagle, 12spd
Archived: Brakes: SRAM Maven Bronze Stealth
Archived: Wheel size: MX · Rims: (F) Reserve 30|HD AL / (R) Reserve 30|HD AL · Hubs: (F) E13 SL, 15x110, 6-Bolt, 32h / (R) E13 SL E-Spec, 12x148, XD, 6-Bolt, 32h · Front tire: Schwalbe Albert, 29x2.5, Trail Radial Ultra Soft · Rear tire: Schwalbe Albert, 27.5x2.5, Trail Radial Soft
Archived: Headset: FSA IS-2/47/42 ACB -or- Cane Creek 10 IS Integrated Headset · Handlebar: OneUp Aluminum Bar, 35mm Rise, 800mm · Stem: Burgtec Enduro MK3, 42mm · Seatpost: OneUp Dropper Post, 31.6 · Saddle: SDG Bel-Air V3, Max Lux-Alloy -or- WTB Volt
Archived: Santa Cruz Heckler SL S · 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.