Marin Bolinas Ridge 2 27.5" Mountain Bike 2025 - Hardtail MTB

The Bolinas Ridge 2 takes everything that makes the Bolinas Ridge 1 a great beginner mountain bike and improves it for riders who want to push their riding a bit further. The frame is made from Marin’s Series 1 aluminium and features a comfortable yet sporty trail geometry. Internal cable routing helps reduce wear and tear and keeps the look sleek and modern.
Key Features:
- Series 1 aluminium frame with trail geometry, internal cable routing and tyre clearance for 2.25
- SR Suntour XCM DS suspension fork with 100mm travel smooths out rough ground
- Shimano Altus 3x8-speed drivetrain with a wide gear range for tackling hills
- Clarks M2 hydraulic disc brakes offer reliable power and modulation
- 27.5” wheels (XS–M) for a nimble ride and better fit for smaller riders
- MTB-ready tyres with a durable tread pattern for grip on loose surfaces
- Internal cable routing keeps the frame tidy and low maintenance
- Available with 0% APR finance
This 27.5” version is designed for riders on frame sizes XS to M, offering a better fit and more playful handling for smaller or younger riders. The geometry strikes a balance between stability and agility, ideal for those just getting into trail riding.
The SR Suntour XCM DS fork provides 100mm of suspension travel, helping absorb bumps and roots without overwhelming new riders. Clarks M2 hydraulic disc brakes are a big step up from mechanical systems giving more stopping power, better control and less maintenance.
Marin has also fitted the Bolinas Ridge 2 with a Shimano Altus 3x8 drivetrain, offering a broad range of gears to help manage climbs and speed on descents. The drivetrain’s reliability and simplicity make it a great match for new riders learning the ropes.
The Marin Bolinas Ridge 2 27.5” is an ideal choice for beginners looking to tackle trails, explore woodland paths or just enjoy adventurous riding beyond tarmac. With its upgraded components and rider-friendly handling, it offers real off-road potential without breaking the bank.
Occasionally, without notice, manufacturers change product design and/or specifications.
| Frame | Series 1 6061 Aluminum, 27.5”/29" Wheels, Low Standover, 68mm BB shell, 135mm Forged Dropouts, Chainstay Mounted Disc Brakes |
| Fork | SR Suntour XCM DS, 100mm Travel, Preload Adjustment, 46mm Offset |
| Headset | FSA No.10-P |
| Stem | Marin Alloy, 31.8mm, 45mm |
| Bars | Marin 31.8 Riser, 12mm Rise, 780mm Width |
| Front Brake | Clark's Clout Hydraulic Disc, 160mm Rotor |
| Rear Brake | Clark's Clout Hydraulic Disc, 160mm Rotor |
| Brake Lever | Clark's Hydraulic |
| Front Mech | Shimano FD-TY700 |
| Rear Mech | Shimano Altus, 8-Speed |
| Shifters | Shimano Altus 3x8-Speed |
| Speed | 24 |
| Rims | Marin, Double Wall Alloy |
| Front Hub | Forged Alloy, Disc, 32H |
| Rear Hub | Forged Alloy, Disc, 32H |
| Spokes | Black Stainless Steel |
| Front Tyre | MTB, 27.5 |
| Rear Tyre | MTB, 27.5 |
| Seat Post | Marin Alloy, 27.2mm |
| Saddle | Marin MTB |
| Bottom Bracket | Sealed Cartridge Bearings, Square Taper |
| Chain | KMC Z8 |
| Cassette | SunRace 8-Speed, 11-34T |
| Pedals | Nylon Platform |
Bolinas Ridge Sizing
See the table below to find the right size Marin Bolinas Ridge.
|
Size |
XS |
S |
M |
L |
XL |
XXL |
|
Rider Height Range |
5’0” – 5’4” |
5’4” – 5’7” |
5’7” – 5’10” |
5’10” – 6’0” |
6’0” – 6’2” |
6’2” – 6’4” |
Read our bike size guide for more information on sizing.
Bolinas Ridge Geometry
|
Size |
S |
M |
L |
XL |
XXL |
|
Stack (mm) |
567 |
574 |
583 |
593 |
612 |
|
Reach (mm) |
387 |
420 |
432 |
434 |
432 |
|
Head Tube Angle |
71 |
72 |
72 |
72 |
72 |
|
Head Tube Length |
123 |
123 |
133 |
143 |
163 |
|
Seat Tube Angle Virtual |
74 |
73.5 |
73.5 |
73 |
72 |
|
Seat Tube Angle Actual |
74 |
73.5 |
73.5 |
73 |
72 |
|
Seat Tube Length (mm) |
381 |
432 |
483 |
521 |
559 |
|
Top Tube Actual (mm) |
535.6 |
566.6 |
581.6 |
592.3 |
606.8 |
|
Top Tube Effective (mm) |
550 |
590 |
605 |
615 |
630 |
|
Bottom Bracket Height (mm) |
283 |
283 |
283 |
283 |
283 |
|
Bottom Bracket Drop (mm) |
70 |
70 |
70 |
70 |
70 |
|
Chainstay (mm) |
445 |
445 |
445 |
445 |
445 |
|
Wheelbase (mm) |
1052 |
1070 |
1086 |
1090 |
1094 |
|
Standover Height (mm) |
663 |
705 |
748 |
779 |
811 |
|
Fork Offset |
51 |
45 |
45 |
45 |
45 |
|
Seatpost Diameter (mm) |
27.2 |
27.2 |
27.2 |
27.2 |
27.2 |
|
Handlebar Width (mm) |
680 |
680 |
680 |
680 |
680 |
|
Stem Length (mm) |
51 |
45 |
45 |
45 |
45 |
|
Crank Length (mm) |
170 |
175 |
175 |
175 |
175 |
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