2025 Marin Alpine Trail XR Mountain Bike
The 2025 Marin Alpine Trail XR is built for riders who demand high-end enduro performance without overspending. Featuring Marin’s Series 4 aluminum MultiTrac 2 LT frame, mixed 29”/27.5” wheels, and long-travel suspension, this bike is designed to thrive on steep, technical terrain.
Xtra Rad Enduro Performance
XR stands for “Xtra Rad”, and this Alpine Trail lives up to the name. Marin paired RockShox Ultimate-level suspension with a reliable SRAM GX Eagle Lunar 12-speed drivetrain and powerful SRAM DB8 4-piston hydraulic brakes to deliver confident handling and braking control on demanding descents.
Adjustable Geometry & Storage
Riders can fine-tune their setup with an adjustable head tube angle, bottom bracket height, and chainstay length. The frame supports a full 29” rear wheel option if desired. Marin’s integrated Bear Box downtube storage includes a zippered internal bag for essential trail gear.
Key Features
- Series 4 6061 aluminum MultiTrac 2 LT frame
- 170mm front / 160mm rear travel
- RockShox Zeb Ultimate fork
- SRAM GX Eagle Lunar 12-speed drivetrain
- Mixed wheel setup: 29” front / 27.5” rear
| Frame | Series 4 6061 Aluminum, MultiTrac LT Suspension Platform, 160mm travel, integrated downtube storage, adjustable headset & CS/BB, Boost 148x12mm thru-axle, 73mm threaded BB, ISCG05 tabs |
|---|---|
| Front Suspension | RockShox Zeb Ultimate, 170mm travel, 29”, 110x15mm Maxle Stealth, 44mm offset |
| Rear Suspension | RockShox Super Deluxe Coil Ultimate, 205x65mm, custom tune (S/M: 350lb spring, L/XL: 450lb spring) |
| Rims | Marin double wall alloy, 29mm internal width, tubeless compatible |
|---|---|
| Front Hub | Formula DC-711, 110x15mm, 6-bolt disc, 32h |
| Rear Hub | Formula DCL-3482, 148x12mm, XD driver, 32h |
| Spokes | 14g black stainless steel |
| Tires |
Maxxis Assegai MAXX GRIP Front: 29x2.5 EXO+ Rear: 27.5x2.5 DoubleDown |
| Rear Derailleur | SRAM GX Eagle Lunar |
|---|---|
| Shifter | SRAM GX Eagle Lunar MMX Mount |
| Crankset | SRAM GX Eagle, 32T, 170mm length |
| Bottom Bracket | SRAM DUB MTB 73 |
| Chain | SRAM NX Eagle |
| Cassette | SRAM XG 1275 Eagle, 10–52T |
| Front Brake | SRAM DB8 4-piston hydraulic disc, 200mm rotor |
|---|---|
| Rear Brake | SRAM DB8 4-piston hydraulic disc, 180mm rotor |
| Handlebar | Marin Trail alloy, 800mm width, 20mm rise |
|---|---|
| Stem | Marin CNC, 35mm length, 35mm bar bore |
| Grips | Marin Grizzly Lock-On |
| Headset | FSA Custom, adjustable head tube angle |
| Seatpost |
TranzX YSP39 dropper post S: 150mm | M/L: 170mm | XL: 200mm |
| Saddle | Marin Speed Concept |
| Drivetrain | SRAM GX Eagle 12-speed |
|---|---|
| Dropper Post | TranzX Remote Dropper |
| Frame Platform | Series 4 Aluminum MultiTrac 2 LT Adjustable Frame |
| Fork Technology | RockShox Zeb Ultimate |
Specifications subject to change without notice.
