San Quentin 3
The Marin San Quentin 3 is for the aggressive hardtail trail rider looking for a blend between singletrack capabilities and extended air time.
This hardtail MTB features a Marzocchi Z2 fork, powerful TRP 4-piston brakes, a wide-range 12-speed drivetrain, and a TranzX dropper post. You also get FSA cranks, grippy Maxxis tires, and a full suite of killer Marin parts. Get ready to shred.
Technology
Dirt jump inspired frame style: Taking cues from the Alcatraz, the San Quentin line up provides all the benefits of the DJ style with massive stand over, slick frame tubes and great paint jobSeries 2 & 3 aluminium frames: The San Quentin 1 features a Series 2 aluminum frame, with tapered head tubes, 3D forged drop outs, IS brake mounts, and semi-internal cable routing. The San Quentin 2 and 3 feature Series 3 aluminum frames, with more advanced tube forming, more complex dropouts, post mount disc tabs, full internal cable routing, and a boost 148mm thru-axle
Modern Trail Geometry: The slack head tube angle paired with a steep seat tube angle create a ride that will fly uphill with perfect front wheel precision but then descend like it’s on rails. The balanced rider position thanks to the steep seat tube puts your weight between the wheels for impressive climbing and handling on flats, while the slack front end and short rear center help to pull you through the rough descents and corners with an intuitive feel.
Geometry

S | M | L | XL | |
---|---|---|---|---|
A STACK | 632 | 636 | 645 | 650 |
B REACH | 422 | 450 | 470 | 500 |
C HEADTUBE ANGLE | 64° | 64° | 64° | 64° |
D HEADTUBE LENGTH | 115 | 120 | 125 | 130 |
E SEATTUBE ANGLE | 77° | 77° | 77° | 77° |
F SEATTUBE LENGTH | 330 | 380 | 410 | 420 |
G TOPTUBE EFFECTIVE | 568 | 596 | 619 | 650 |
H BB HEIGHT | 327 | 327 | 327 | 327 |
I BB DROP | 50 | 50 | 50 | 50 |
J CHAINSTAY | 425 | 425 | 430 | 430 |
K WHEELBASE | 1182 | 1212 | 1236 | 1268 |
L STANDOVER HEIGHT | 650 | 683 | 688 | 695 |
M FORK OFFSET | 37 | 37 | 44 | 44 |
SEATPOST DIAMETER | 30.9 | 30.9 | 30.9 | 30.9 |
HANDLEBAR WIDTH | 780 | 780 | 780 | 780 |
STEM LENGTH | 35 | 35 | 35 | 35 |
CRANK LENGTH | 170 | 170 | 170 | 170 |
FAQs: San Quentin 3 29'' 2025
Basics
What size bike do I need?
What is Invisiframe and is it worth fitting it to the San Quentin?
What is tubeless setup and can the San Quentin be set up tubeless?
What equipment & info will the bike arrive with?
Is it possible to see the San Quentin in your showroom & is it possible to have a test ride or demo it?
What type of bike is the San Quentin and what is it designed for?
What type of terrain is the San Quentin ideally suited towards? Singletrack trails with some technical descents. Up to and including red routes at trail centres.
How should you clean & maintain the San Quentin 3 29''?
Can you tell me about the Marin brand?
I'm new to riding, what essential bits of kit do I need to get going?
Where can I ride the San Quentin 3 29''?
Technical
Where can I find all of the major components that come on the bike?
Can you fit a water bottle on the bike?
What warranty comes on the San Quentin 3 29''?
Does the San Quentin 3 29'' come with pedals?
Can I get hold of spare / replacement parts easily for the San Quentin 3 29''?
Can I add upgrades to the bike?
Purchasing
Why choose MTB Monster?
Do you offer 0% finance for the San Quentin 3 29''?
Do you accept Cycle To Work vouchers? How does it work?
I'm still sorting my payment method, can I reserve a bike?
The bike is not yet in stock, can I pre-order one?
How will the bike be delivered & what are the setup requirements?
What are the delivery options?
Can I collect the bike in the store?
I still have more questions, can I speak to someone?
- FRAME:
- Series 3 6061 Aluminum, Double Butted, Internal Cable Routing, 12x148mm Thru-Axle, 73mm Threaded BB
- FRAME MATERIAL:
- Aluminum
- FORK BRAND:
- Marzocchi
- FORK:
- Marzocchi Bomber Z2, 110x15mm Boost Spacing, 140mm Travel, Kabolt Axle, 44mm Offset
- FORK TRAVEL:
- 140 mm
- WHEEL SIZE:
- 29
- WHEELS:
- Rims: Marin Aluminum Double Wall, Disc Specific, 29mm Inner, Sleeved Joint, 32H, Tubeless Compatible / Hubs: Shimano HB-MT410B (R), Shimano HF-MT410B (F) / Spokes: 14g Black Stainless Steel
- TYRES:
- Maxxis Assegai, 29 x 2.5" MAXX TERRA, EXO Casing, Tubeless Compatible
- DROPPER SEATPOST:
- Yes
- SEATPOST:
- TranzX, YSP23JL, 1x Remote, Size S 125mm Travel, Size M 150mm Travel, Size L-XL 170mm Travel, 30.9mm
- SADDLE:
- Marin Speed Concept
- CRANKSET:
- FSA Comet, Modular 1x, 32T Direct Mount Chainring, MegaTooth Technology, Boost Spacing
- STEM:
- Marin 3D Forged Alloy, 35mm
- GRIPS:
- Marin Grizzly Lock On
- SHIFTERS:
- Shimano Deore, 12-Speed, SL-6100IR
- BRAKE BRAND:
- TRP
- HYDRAULIC BRAKES:
- Yes
- BRAKES:
- TRP Slate EVO 4-Piston Hydraulic, Resin Pads, 203mm Rotor - TRP Slate EVO, 4-Piston Hydraulic, Resin Pads, 180mm Rotor
- REAR DERAILLEUR:
- Shimano Deore, 12-Speed, SGS
- CHAIN:
- KMC X-12 Silver and Black
- NUMBER OF GEARS:
- 12 speed
- PEDALS:
- Marin Oso OE Flat
- FRONT MUDGUARD:
- MTB Monster
- EXTRAS:
- N/A
- TYPE OF BIKE:
- Trail
- DESIGNED FOR:
- Exploring new trails or going on longer rides where you encounter varied terrain. More relaxed geometry than a Cross Country bike and an excellent balance of climbing ability and downhill capability making it a great all-rounder
- IDEAL TERRAIN:
- Singletrack trails with some technical descents. Up to and including red routes at trail centres.
- PLEASE NOTE:
- Specifications, pricing, and availability are subject to change without notice.