Bicycle frame in silver with red Marin graphics
A mountain biker wearing a red shirt, black pants, and a white helmet rides a red and black bike along a dirt trail on a grassy, rocky hillside under an overcast sky.
White bicycle frame with 'Marin' branding on a white background
White bicycle frame with red 'Marin' logo on a white background

Alpine Trail XR Frame Kit

$3,499.99

$3,499.99

$3,499.99

$3,499.99

Trustpilot

Maximum enduro, zero compromises. Build your fantasy enduro rig – the Alpine Trail XR Frameset is the best chassis we've ever made. A Series 4 Aluminum frame, full geometry adjustment, 160mm travel MultiTrac LT suspension platform and integrated downtube storage. Mixed wheel or full 29in compatible, UDH and ride-hushing chain slap protection. It's unapologetically the best. RockShoxVivid Air Ultimate rear shock included – the rest is up to you. Charge hard. Send big. Drift deep. Repeat. 

color: GREY WHITE RED
Size
l

Tech Documents

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Bicycle frame in silver with red Marin graphics
A mountain biker wearing a red shirt, black pants, and a white helmet rides a red and black bike along a dirt trail on a grassy, rocky hillside under an overcast sky.
White bicycle frame with 'Marin' branding on a white background
White bicycle frame with red 'Marin' logo on a white background
Specifications Geometry Support

Specifications

SPEC AND PRICE BEING SUBJECT TO CHANGE WITHOUT NOTIFICATION

Frame

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, 148x12mm Boost Thru- Axle, 73mm Threaded BB w/ ISCG05 Tabs

Rear Suspension

RockShox Vivid Air Ultimate, 205x65, 30xM8 Lower Hardware, Custom Tune

Headset

FSA Custom Headset, Adjustable HTA Design

Extras

Marin MTB Seat Clamp - Bolt Type, Bolt-On 12mm Thru-Axle, 174mm Length, 1.0 Thread Pitch, 16.5mm, Tapered Head, Downtube Storage Bag

Geometry

Geometry S M L XL
A Stack 620 634 643 64.7
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 length 400 420 430 450
F Seattube angle 79° 79° 79° 79°
G Toptube effective 556 592 626 659
H Bb height 352 352 352 352
I Bb drop 24 | 7 24 | 7 24 | 7 24 | 7
J Chainstay 442 442 442 442
K Wheelbase 1211 1248 1283 1318
L Standover height 683 690 695 698
M Fork offset 44 44 44 44
N Seatpost diameter 34.9 34.9 34.9 34.9
O Handlebar width 780 780 780 780
P Stem length 35 35 35 35
Q Crank length 160 160 160 160

Find Your Fit

Your Height 5'3" / 160cm

slide the scale to your height measurement

You ride a

GREY WHITE RED / L

Bicycle frame in silver with red Marin graphics

Alpine Trail XR Frame Kit

Unsure about your size? Check with your local Marin dealer for personalized advice.

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