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The San Quentin 51cm (20") is a hardcore hardtail mountain bike built with a stout Series 2 aluminium frame and Manitou J Unit 80mm air suspension fork.
The San Quentin 51cm (20") is a hardcore hardtail mountain bike built with a stout Series 2 aluminium frame and Manitou J Unit 80mm air suspension fork.
Marin

Marin San Quentin Jr. 20 Mountain Bike in Yellow/Orange

£999.00
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With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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RETURNS ONLINE

For items purchased online, you can send them back for a full refund within 28 days, provided it has not been used or fitted, and is returned with any packaging that form part of the goods with a valid proof of purchase.

If your item is faulty, please complete and include the returns formwith your goods when sending it back to us. Please retain your proof of postage as we will need that to reimburse you the cost of the return for the faulty items. This will be done once the return has been processed.

Here's the return address:

Louth Cycle Centre ltd

Returns Dept,
Unit 10 - 11 Station Estate,
Newbridge Hill,
Louth,
Lincolnshire.
LN11 0JT

For yours and our safety; if your items are glassware etc, i.e something sharp, please email pictures to us and don't send anything back until we've been in contact with you.

For any returns, the original packaging and swing tickets, where applicable, need to still be in place.

Please note: Unfortunately, you can't return swimwear, underwear, pierced jewellery, personalised or bespoke items, items which deteriorate or expire rapidly, magazines, items that are sealed for hygiene reasons, computer games with the seal broken or any items that have been inseparably mixed after delivery.

RETURNS-BOUGHT IN STORE

To return your item(s) bought in store for a credit note or where possible make an exchange, visit Louth Cycle Centre within 28 days of purchase provided your item has not been used or fitted, and is returned with any packaging that form part of the goods with a valid proof of purchase. This may not be possible on special order or custom built/personalised items.

If your item is faulty, we will provide a full refund. Please provide a valid proof of purchase.

Unfortunately, you can't return swimwear, underwear, pierced jewellery, personalised or bespoke items, items which deteriorate or expire rapidly, magazines, items that are sealed for hygiene reasons, computer games with the seal broken or any items that have been inseparably mixed after delivery.

CAN I EXCHANGE AN ORDER?

You can return an online item for an exchange. Please mark size required on the returns form.

If we don’t have the item you want in stock, we will process a refund instead.

Marin San Quentin Jr. 20 Mountain Bike in Yellow/Orange

Season:2026

Brand:Marin

Code:740689001

Designed with the input of freeride legend Matt Jones, the San Quentin takes the DNA of Marin's dirt-jumping Alcatraz and mutates it into a go-further and faster all-round, hardcore hardtail.

The San Quentin 51cm (20") will feel just like a ‘grown up’ mountain bike, built with a stout Series 2 aluminium frame, 51cm (20") wheels, and a Manitou J Unit 80mm air suspension fork meaning more adjustability for lighter shredders. Further updates include a one-piece seatpost and saddle to allow for a lower standover and ride height, 1 x 8-speed clutch enabled MicroShift Acolyte drivetrain, tubeless compatible tyres, and kid’s specific hydraulic disc brakes.

Features:

  • Shimano 1 x 8 clutch enabled drivetrain
  • One-piece seatpost and saddle
  • Manitou J Unit 80mm air fork
Technical Information
  • Frame
    Series 2 6061 aluminium, 20” wheels, disc specific, 30.9 post and dropper compatible
  • Front suspension
    Manitou Junit Sport, 20", 80mm travel, air sprung, adjustable rebound, tapered steerer, 15x110mm axle
  • Rim
    Marin, double wall alloy, 26mm internal, tubeless compatible
  • Hubs
    Forged aluminium, 32H, disc specific
  • Spokes
    14g stainless steel
  • Tires
    Delium Versatile, 20”x2.4”, light construction, wire bead
  • Rear derailleur
    MicroSHIFT Acolyte, 8-speed, super short cage, clutch
  • Shift lever
    MicroSHIFT Acolyte, short-reach, 8-speed
  • Crankset
    Forged alloy, narrow wide 30T, 127mm
  • Bottom bracket
    Sealed cartridge bearings, square taper
  • Chain
    KMC Z8
  • Cassette
    MicroSHIFT Acolyte, 8-speed, 11-38T
  • Brakes
    Tektro HD-J285 kid's specific hydraulic disc
  • Brake levers
    Tektro kid's specific short reach lever for hydraulic brake
  • Handlebar
    Marin riser, 31.8mm clamp, 30mm rise, 580mm width, 19mm OD grip section
  • Stem
    Marin alloy, 40mm
  • Grips
    Marin MTB, small diameter
  • Headset
    FSA No. 57E
  • Seatpost
    Integrated with saddle
  • Saddle
    Marin one-piece saddle/post combo, 27.2mm alloy post
  • Pedals
    Kids specific nylon pedal
  • Stack
    433mm
  • Reach
    310mm
  • Headtube angle
    65°
  • Headtube length
    90mm
  • Seattube length
    280mm
  • Seattube angle
    75°
  • Toptube effective
    426.1mm
  • BB height
    260mm
  • BB drop
    10mm
  • Chainstay
    340mm
  • Wheelbase
    922mm
  • Standover height
    534mm
  • Fork offset
    40mm
  • Seatpost diameter
    30.9mm
Sizing Information
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