Marin San Quentin JR 20 2026

£899.00

Marin San Quentin JR 20 Mountain BikeThe Marin San Quentin JR 20 brings the attitude of the full size San Quentin to younger riders who want a real mountain bike feel. Designed with input from Matt Jones, it blends dirt jump DNA with a tough all round trail setup. The — Read More

GTIN (UPC): 26MARINSANQUENTINJR20 Categories: , , Brand:

Spread the cost from £74.92 monthly*

Buying Guides

Description

Marin San Quentin JR 20 Mountain Bike

The Marin San Quentin JR 20 brings the attitude of the full size San Quentin to younger riders who want a real mountain bike feel. Designed with input from Matt Jones, it blends dirt jump DNA with a tough all round trail setup. The Series 2 aluminium frame is strong and confidence inspiring, paired with a Manitou J Unit 80 mm air fork that offers proper adjustability for lighter riders. A microSHIFT Acolyte 8 speed drivetrain with clutch, kid specific hydraulic disc brakes and tubeless compatible wheels make the San Quentin JR 20 a capable and progression ready bike for young shredders.

Key Features

  • Series 2 aluminium frame

  • Manitou J Unit 80 mm air fork

  • microSHIFT Acolyte 8 speed drivetrain

  • Kid specific hydraulic disc brakes

  • 20 inch wheels

  • 2.4 inch Delium Versatile tyres

  • One piece saddle and seatpost

Strong Aluminium Frame

The Series 2 aluminium frame is built for young riders who want a real mountain bike feel. It uses a low standover height, disc specific design and internal routing. The frame is dropper post compatible and uses a 27.2 mm seatpost. A one piece saddle and post allow a lower ride height for smaller riders.

Manitou J Unit Suspension

The Manitou J Unit Sport fork provides 80 mm of air sprung travel with rebound adjustment. It is designed specifically for young riders, offering lighter spring rates and proper tuning. The 15 x 110 mm axle adds stiffness and control on rough terrain.

Acolyte Drivetrain And Hydraulic Brakes

The microSHIFT Acolyte 8 speed drivetrain uses a clutch derailleur for improved chain retention on rough ground. The short reach shifter is designed for smaller hands. Kid specific hydraulic disc brakes provide strong and predictable stopping power.

Durable Wheels And Grippy Tyres

Marin double wall rims, forged hubs and 2.4 inch Delium Versatile tyres create a tough and stable wheel setup. The tyres use a light construction for easier rolling and are tubeless compatible for improved grip and puncture protection.

Bike specifications are advised by the manufacturer and can be subject to change without prior warning.

Please call our helpful sales team on 01539 821 443 or email us for the latest up-to-date product information.

Specification

Frame

Series 2 6061 Aluminum, 20" Wheels, Disc Specific, 30.9 Post and Dropper Compatible

Fork

Manitou Junit Sport, 20", 80mm Travel, Air Sprung, Adjustable Rebound, Tapered Steerer. 15x110mm Axle

Head Set

FSA No. 57E

Stem

Marin Alloy, 40mm

Handle Bars

Marin Riser, 31.8mm Clamp, 30mm Rise, 580mm Width, 19mm OD Grip Section

Tape Grips

Marin MTB, Small Diameter

Brakes

Tektro Kid's Specific Short Reach Lever for Hydraulic Brake

Brake Levers

Tektro HD-J285 Kid's Specific Hydraulic Disc

Rear Derailleur

Shimano Altus

Rear Hub

Forged Aluminum, 32H, Disc Specific

Front Hub

Forged Aluminum, 32H, Disc Specific

Shift Levers

Shimano Altus SL-M315, 8-Speed

Cassette

Shimano 8-speed, 11-32T

Chainset

Forged Alloy, Narrow Wide 30T, 127mm

Wheels

Marin Aluminum Double Wall, Disc Specific

Saddle

Marin One-Piece Saddle/Post Combo, 27.2mm Alloy Post

Discipline

MTB

Material

Aluminium

Wheel size

20"

Electric

No

Season

2026

Add bike + kit to your basket

Add bike + kit to your basket

Checkout with V12 Finance with online acceptance

Checkout with V12 Finance with online acceptance

We contact you to confirm order and arrange shipping

We contact you to confirm order and arrange shipping

Please use our calculator below to help you see what finance options are available. To apply for finance, please select this option at the checkout.

Step 1:Choose your finance option

Please specify the finance option that you wish to choose.

From £74.88 per month.

Step 2:Choose your deposit amount

Please specify the deposit amount that you wish to pay.

The accepted value is between £0.00 and £269.70

Representative finance example

Amount of credit £899.00. 12 monthly repayments of £74.88. Representative APR 0.00%. Total amount repayable £899.00.
APR Fixed 0.00%
Installment Amount £74.88/month
Repayment Term 12 months
Total Interest Charged £0.00
Deposit Amount £0.00

Cycle to work scheme

Wheelbase has teamed up with; CycleScheme, Halfords, Green Commute Initiative, as well as, Vivup, Cycle Solutions & Bike2Work to offer PAYE employees a healthier way to commute. The scheme stems from the U.K Government’s Green Transport Plan which is designed to get more people out and about riding bikes and reaping the multitude of personal and environmental benefits!
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To make a purchase using your Cycle to Work voucher, please submit the Reserve Your Bike form, making sure to attach your voucher. We will make contact to confirm your order and advise the next steps.

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To reserve a bike while you wait to receive your voucher, please submit the Reserve Your Bike form, we will seek a refundable holding deposit and advise on the next steps. If you require more information about Cycle To Work, contact us though the link below.

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