San Quentin 3
OverviewAbout the Marin San Quentin 3
The Marin San Quentin 3 is a mountain bike, built on an aluminium frame, listed at $2,299.99 at BikesOnline. An off-road bike for trails, with grippy tyres and trail-ready geometry.
How it comparesThe San Quentin 3 against similarly priced bikes
- At $2,299.99 it costs less than 65% of the 223 mountain bikes we list.
- Head angle: 64.0 degrees, slacker, so steadier on descents than the middle of similarly priced hardtail mountain bikes (65.0 degrees).
- Front travel: 140 mm, more than the middle of similarly priced hardtail mountain bikes (130 mm).
- Lowest gear ratio: 0.63, about the same as similarly priced hardtail mountain bikes (middle 0.63).
- Gears at the back: 12-speed, about the same as similarly priced hardtail mountain bikes (middle 12-speed).
- Stock tyre width: 64 mm, about the same as similarly priced hardtail mountain bikes (middle 63 mm).
- It comes with a dropper post; 13 of 13 similarly priced hardtail mountain bikes do.
Closest alternatives on price
same price · 11-speed vs 12-speed
same price · 160 mm fork vs 140 mm
$100 less · 150 mm fork vs 140 mm
$149 more · 120 mm fork vs 140 mm
Compare the San Quentin 3 with the two closest side by side
Compared with the 17 similar mountain bikes on BikeFinder priced $1,600 to $3,100, using each bike's published specs and the price shown on its page.
SizingWhat size San Quentin 3 do I need?
Enter your height to see the size Marin recommends.
| Size | Rider height | In feet |
|---|---|---|
| S (27.5") | 157 to 165 cm | 5 ft 2 in to 5 ft 5 in |
| M (27.5") | 165 to 173 cm | 5 ft 5 in to 5 ft 8 in |
| L (27.5") | 173 to 178 cm | 5 ft 8 in to 5 ft 10 in |
| XL (27.5") | 178 to 183 cm | 5 ft 10 in to 6 ft 0 in |
| S (29") | 157 to 165 cm | 5 ft 2 in to 5 ft 5 in |
| M (29") | 165 to 173 cm | 5 ft 5 in to 5 ft 8 in |
| L (29") | 173 to 178 cm | 5 ft 8 in to 5 ft 10 in |
| XL (29") | 178 to 183 cm | 5 ft 10 in to 6 ft 0 in |
Rider heights from Marin's size chart. Height is a starting point: arm and leg length, flexibility and riding style all matter, so a test ride beats any chart. How bike sizing works.
SpecificationsWhat we know
- Brand
- Marin
- Category
- Mountain
- Frame
- Aluminium
- Wheel size
- 29-inch (27.5-inch on the smaller sizes)
- Drivetrain
- Shimano Deore 1x12
- Brakes
- Disc
- Frame sizes
- S (27.5"), M (27.5"), L (27.5"), XL (27.5"), S (29"), M (29"), L (29"), XL (29")
- Price
- $2,299.99 at BikesOnline, was $2,799.99. In stock, checked 3 Nov 2026.
Specs and pricing are listed in AUD and sourced from Australian retail listings. Confirm the current details and availability with the seller before purchase.
GeometrySize M (29 inch)
- Stack
- 636 mm
- Reach
- 450 mm
- Stack/reach
- 1.41
- Head angle
- 64 deg
- Seat angle
- 77 deg
- Wheelbase
- 1212 mm
- Chainstay
- 430 mm
- BB drop
- 50 mm
- Standover
- 683 mm
- Fork rake
- 44 mm
GearingRatios
Ratios are derived from the chainrings and cassette. They describe the gearing, not any rider's ability.
Drivetrain & buildFull specification
- Groupset
- Shimano Deore
- Shifting
- Mechanical
- Drive
- 1x
- Speeds
- 12
- Crank
- FSA Comet, Megatooth Technology, Boost Spacing, 170mm Arm Length
- Chainrings
- 32
- Cassette
- SunRace, 12-Speed, MicroSpline, 10-51T
- Rear derailleur
- Shimano Deore RD-M6100-SGS, 12-Speed
- Brakes
- TRP Slate EVO, 4-Piston Hydraulic, Resin Pads
- Rotors
- 203/180mm
- Wheelset
- Marin Aluminum Double Wall, Disc Specific, 29mm Inner, Sleeved Joint, 32H, Tubeless Compatible
- Rim internal width
- 29 mm
- Stock tyre
- 29x2.5
- Tubeless
- Yes
- BB standard
- Threaded
- Seatpost
- TranzX, YSP23JL, 1x Remote, Size S 125mm Travel, Size M 150mm Travel, Size L-XL 170mm Travel, 30.9mm
- Cockpit
- Marin 3D Forged Alloy, 35mm / Marin Mini-Riser, 6061 Double Butted Aluminium, 780mm Width, 28mm Rise, 5 deg Up, 9 deg Back
- Saddle
- Marin Speed Concept
- UDH
- Yes
SuspensionMTB detail
- Front travel
- 140 mm
- Fork
- Marzocchi Bomber Z2
- Wheel config
- 29
- Dropper
- TranzX
- Dropper travel
- 150 mm
- Discipline
- Trail
- Suspension
- hardtail
Bike DNAWhat the numbers say
- Steering
- A 64 deg head angle points to very slack, built for steep descending.
- Climbing
- Lowest ratio 0.63 is a very low climbing gear for steep or loaded climbs.
Derived from the published geometry and gearing above. It describes the numbers, not a ride test.
BikeFinder Data Profile: geometry and specification researched from published sources (BikesOnline product page (specification list and geometry table)), verified 2026-11-03. This is a specification analysis, not a physical ride review.
Where to buyStockist
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