Marin Alpine Trail XR 2025 Enduro Bike

The all-new Alpine Trail series is our boldest and most capable line of enduro bikes ever, built upon our most advanced, most adjustable frames to date.

Series 4 aluminum MultiTrac 2 LT frames feature mixed 29”/27.5” wheels, 170mm front and 160mm rear travel, and the utmost in adjustability. Riders can alter the head tube angle and bottom bracket/chainstay length, as well as run 29” rear wheels if desired. “Bear Box” downtube storage includes a zippered nylon bag to house trail essentials, and a 34.9mm seatpost increases strength and is compatible with the latest dropper posts.

“XR” = “Xtra Rad” here at Marin, and like the XR models that have preceded the new Alpine Trail, we created a model for the more discriminating rider. We focused our efforts on building a bike with high performance RockShox Ultimate-level suspension, a SRAM GX Eagle Lunar 12-speed drivetrain and DB8 4-piston brakes – all equipment that helps the rider level up, but without blowing the budget. Don’t forget the Maxxis rubber and our proprietary CNC machined 35mm stem and matching Trail Bar.

Specification

Frame	All New Series 4 6061 Aluminum, 29” Wheels, 160mm Travel MultiTrac LT Suspension Platform, Integrated Downtube Storage, Adjustable Headset & CS Length/BB Height, Full Internal Cable Routing, Chainstay Mounted Post Mount Disc Brake, 148×12mm Boost Thru- Axle, 73mm Threaded BB w/ ISCG05 Tabs
Fork	RockShox Zeb Ultimate, 170mm Travel, 29”, 110×15mm Maxle Stealth, 44mm Offset
Rear Shock	RockShox Super Deluxe Coil Ultimate, 205×65, 30xM8 Lower Hardware, Custom Tune, Spring Rates S/M: 350lbs, L/XL:450lbs
Rim	Marin, Double Wall Alloy, 29mm Inner, Sleeved Joint, Disc Specific, 32H, Tubeless Compatible
Rear Hub	Formula, DCL-3482, 148×12, 4 Sealed Bearings, 6-Bolt Disc, XD Driver, 32H
Front Hub	Formula, DC-711, 110×15mm, 6-Bolt Disc, 32h
Spokes	14g Black Stainless Steel
Tyres	Maxxis Assegai MAXX GRIP, Front 29×2.5 EXO+, Rear 27.5×2.5” DoubleDown, Tubeless compatible
Rear Derailleur	SRAM GX Eagle Lunar 12-Speed
Shifter	SRAM GX Eagle Lunar MMX Mount
Crankset	SRAM GX Eagle, 32T, 55MM CL, 170MM Length
Bottom Bracket	SRAM DUB MTB 73
Chain	SRAM NX Eagle
Cassette	SRAM GX 1275 T-Type 10-52T
Front Brake	SRAM DB8 4-Piston Hydraulic Disc, HSC 200mm Rotor
Rear Brake	SRAM DB8 4-Piston Hydraulic Disc, HSC 200mm Rotor
Handlebar	Marin Trail, 35mm Clamp, 7000 Alloy Bar, 800mm Length, 20mm Rise, 5 Degree Up, 8 Degree Back
Stem	Marin CNC, 35mm Length, 35mm Bar Bore
Grips	Marin Grizzly Lock-On
Headset	FSA Custom, Adjustable HTA Design
Seatpost	TranzX, YSP39 1x Remote, 34.9 Seatpost Diameter, Travel S = 150mm, M/L = 170mm, XL = 200mm
Saddle	Marin Speed Concept
Pedals	N/A
Extras	Bolt-On 12mm Thru-Axle, 174mm Length, 1.0 Thread Pitch, 16.5mm, Tapered Head
Extras	Downtube Storage Bag

Specifications are subject to change without notice

Size Guide

Frame Size	Minimum Height	Maximum Height
Small	160cm (5’3”)	168cm (5’6”)
Medium	168cm (5’6”)	178cm (5’10”)
Large	178cm (5’10”)	188cm (6’2”)
X Large	188cm (6’2”)	195cm (6’5”)

We have developed our size guide from our selling experience and it may differ from the manufacturers guide. Please note, this is only a guide and if you have any concerns over sizing please get in contact

Geometry

Geometry configuration – 29/27.5 wheels – BB High – Chainstay Short – Headtube 0°

Frame Size	S	M	L	XL
A – Stack	620.08	633.51	642.6	646.93
B – Reach	430	460	490	520
C – Headtube Angle	63.5°	63.5°	63.5°	63.5°
D – Headtube Length	100	115	125	130
E – Seattube Angle	79.2°	79°	78.8°	78.6°
F – Seattube Length	400	420	430	460
G – Toptube Effective	556	592	626	659
H – BB Height	352	352	352	352
I – BB Drop (Rear/Front)	7/24	7/24	7/24	7/24
J – Chainstay	435	435	435	435
K – Wheelbase	1211.42	1248.11	1282.57	1317.8
L – Standover Height	683.32	68 9.88	695.6	698.13
M – Fork Offset	44	44	44	44
Seatpost Diameter	34.9	34.9	34.9	34.9
Handlebar Width	780	780	780	780
Stem Length	35	35	35	35
Crank Length	160	160	160	160

Want to compare the size of your current bike to this one? Read our Reach and Stack guide here.