2025 Marin San Quentin 3 29er Hardtail Mountain Bike

£1,699.00

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The Marin San Quentin 3 29er Hardtail Mountain Bike is for the aggressive hardtail trail rider looking for a blend between singletrack capabilities and extended air time. Developed in conjunction with freeride legend Matt Jones and taking its name from the most rough and tumble piece of Marin County, the San Quentin collection lives up to the notoriety of the namesake maximum security California State Prison. Blending the strength an style of an Alcatraz dirt jump frame with the natural trail savvy of the best hardtails, the San Quentin family of aggressive trail hardtails is the perfect mash-up for the modern trail rider.

The San Quentin 2 and 3 feature Series 3 aluminium frames, with more advanced tube forming, more complex dropouts, post mount disc tabs, full internal cable routing, and a boost 148mm thru-axle. 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 a sexy paint job. 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 centre help to pull you through the rough descents and corners with an intuitive feel. San Quentin 2 and 3 models feature ISCG 05 tabs for easy chain retention device installation for rowdier riders.

The Marin San Quentin 3 29 is the top of the range model but still comes in at an affordable price. It comes with 29" wheels, a TranzX dropper post, Marzocchi Bomber Z2 suspension fork, TRP brakes, Maxxis tyres and plenty of awesome Marin kit to create a bike you’ll love to rip, but that won’t shred your budget.

This bike is perfect for

Mountain bikers who want an aggressive hardtail that can handle trail rides and bike parks so you can hit big jumps and hammer singletrack on the same ride.

Key Features

  • All New Series 3 6061 Aluminium frame made for 29er wheels
  • Marzocchi Bomber Z2 140mm Travel Fork
  • 1x12 speed Shimano Deore gearing and TRP Slate EVO 4-Piston Hydraulic brakes

Mountain Bike Buying Guide

Mountain biking is an incredibly diverse sport. Mountain bikes now come in three main flavours. They are XC, Trail and Enduro.

XC – short for cross country, are quick race bikes. They will normally have 29” wheels and come with 100mm of suspension. If you are mainly going to be riding bridleways and natural trails in the South East of England, where our shops are, an XC bike will be the quickest and most efficient option.

Trail – these bikes are designed to be pedalled up and down hill and for use on bridleways and natural trails, but also at dedicated trail centres. They normally come with 130mm or 140mm of suspension travel and can have either 27.5” or 29” wheels, but 29” is quickly becoming the norm. Trail bikes are good all-rounders. They won’t be as fast as an XC bike on the flat but they can handle a lot more challenging terrain, and a few jumps. If you plan on taking your bike to trail centres in Wales, or to the Alps, then a trail bike may be your best option.

Enduro – enduro racing is a thing in and of itself but many people buy enduro bikes for ‘aggressive’ trail riding and uplift days at places like Bike Park Wales. This generally means challenging downhill trails with some big jumps. With around 160mm of suspension travel enduro bikes can take some big hits. They are designed to be efficient enough to pedal up hills but really come into their own when pointed downhill. You get enduro bikes in either 27.5” or 29” wheel sizes as well as mullet setups of 29 at the front and 27.5 at the back.


Men’s and women’s mountain bikes

Nearly all the mountain bikes we sell are now unisex. All of the big brands have gradually stopped doing dedicated men’s and women’s bikes over the last few years. Instead they are focussed on producing bikes in a bigger range of sizes. So, for instance, the Trek Marlin 5 is a unisex bike that now comes in sizes from XXS to XXL large. This means it will fit riders from 4’ 5” to 6’ 5” and everything in between.


Read our full mountain bike buyers guide


Price Match at Cycles uk

We understand that price is important, so we regularly price-check our competitors to make sure we have the best offers available. We recognise that we will not always be the cheapest, so if you see the same product cheaper from any of our competitors then please get in touch via the form below and we will do our best to match any reasonable advertised price.

Frame - All New Series 3 6061 Aluminium, Double Butted, Internal Cable Routing, 12x148mm Thru-Axle, 73mm Threaded BB

Front Suspension - Marzocchi Bomber Z2, 110x15mm Boost Spacing, 140mm Travel, Kabolt Axle, 44mm Offset

Rim - Marin Aluminum Double Wall, Disc Specific, 29mm Inner, Sleeved Joint, 32H, Tubeless Compatible

Hub Rear - Shimano FH-TC500, 148x12, MicroSpline Freehub Body, Centerlock Disc, 32H

Hub Front - Shimano HF-MT410B, 110x15mm, Disc

Spokes Nipples - 14g Black Stainless Steel

Tyres - Maxxis Assegai, 29 x 2.5" MAXX TERRA, EXO Casing, Tubeless Compatible

Derailleur Rear - Shimano Deore, 12-Speed, SGS

Shift Lever - Shimano Deore, 12-Speed, SL-6100IR

Crankset - FSA Comet, Modular 1x, 32T Direct Mount Chainring, MegaTooth Technology, Boost Spacing

Bottom Bracket - FSA MegaExo 73mm BSA

Chain - KMC X-12 Silver and Black

Cassette - SunRace, 12-Speed, MicroSpline, 10-51T

Brakes Front - TRP Slate EVO, 4-Piston Hydraulic, Resin Pads, 203mm Rotor

Brakes Rear - TRP Slate EVO, 4-Piston Hydraulic Disc, Resin Pads, 180mm Rotor

Brake Levers - TRP Slate EVO, I-Spec EV Compatible

Handlebar - Marin Mini-Riser, 6061 Double Butted Aluminium, 780mm Width, 28mm Rise, 5º Up, 9º Back

Stem - Marin 3D Forged Alloy, 35mm

Grips - Marin Grizzly Lock On

Headset - FSA No 57E, Semi-Sealed Cartridge Bearings, 1 1/8" x 1 1/2”

Seatpost - TranzX, YSP23JL, 1x Remote, Size S 125mm Travel, Size M 150mm Travel, Size L-XL 170mm Travel, 30.9mm

Saddle - Marin Speed Concept

Pedals - Marin Oso OE Flat

Colours Gloss White/Black/Red, WHITE/BLACK
Sizes Extra Large, Large, Medium
Brand MARIN
Barcodes 843346127181, 843346127198, 843346127204
SKUs / Part Numbers 737607002, 737607003, 737607004

Please note: Manufacturers can sometimes change the specification of the products from time to time.

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