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Marin Bikes San Quentin Jr 20 2026

Pricing
£899.00
**Ordered Upon Request**
Low Stock To Order

Finance* from £67.42 per month

*subject to status, minimum spend applies

See info below
Cycle 2 work Discounted Bikes
How long will delivery take
How To Assemble Your New Bike
Discount Code
Specifications
Price Match
Click & Collect
Size Guides
Model Year 2026
Options OS YELLOW/ ORANGE Low Stock To Order
Style "The Marin San Quentin shreds the boundaries of the mountain bike genres - doing it all with a huge splash of big air, speed and style.

Designed with the input of freeride legend Matt Jones, the San Quentin takes the DNA of our dirt-jumping Alcatraz and mutates it into a go-further and faster all-round, hardcore hardtail. Pedal all day in the hills, send it at the dirt jumps, carve the skatepark, go big in the bike park - it's all good on the San Quentin."
"Designed with the input of freeride legend Matt Jones, the San Quentin takes the DNA of our dirt-jumping Alcatraz and mutates it into a go-further and faster all-round, hardcore hardtail.

The San Quentin 20" will feel just like a 'grown up' mountain bike to your little ripper, built with a stout Series 2 aluminum frame, 20" wheels, and for 2025/26, a new Manitou J Unit 100mm 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 Shimano drivetrain, tubeless compatible tyres kid's specific hydraulic disc brakes."
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
Headset: FSA No. 57E
Stem: Marin Alloy, 40mm
Handlebar: Marin Riser, 31.8mm Clamp, 30mm Rise, 580mm Width, 19mm OD Grip Section
Grips: Marin MTB, Small Diameter
Brake Levers: Tektro Kid's Specific Short Reach Lever for Hydraulic Brake
Brakes Front: Tektro HD-J285 Kid's Specific Hydraulic Disc
Brakes Rear: Tektro HD-J285 Kid's Specific Hydraulic Disc
Tires: Delium Versatile, 20" x2.4" , Light Construction, Wire Bead
Rim: Marin Aluminum Double Wall, Disc Specific
Hub Front: Forged Aluminum, 32H, Disc Specific
Hub Rear: Forged Aluminum, 32H, Disc Specific
Spokes: 14g Black Stainless Steel
Derailleur Front: -
Derailleur Rear: Shimano Altus
Shift Lever: Shimano Altus SL-M315, 8-Speed
Chain: KMC Z8
Cassette: Shimano 8-speed, 11-32T
Crankset: Forged Alloy, Narrow Wide 30T, 127mm
Bottom Bracket: Sealed Cartridge Bearings, Square Taper
Pedals: -
Saddle: Marin One-Piece Saddle/Post Combo, 27.2mm Alloy Post
Seatpost: Integrated With Saddle
J C COOK CYCLES CLICK & COLLECT SERVICE

Our Click & Collect service offers all the benefits of shopping online combined with specialist personal retail experience in one of our stores. Simply order your items, select Click & Collect and pick up your item at a time that's convenient for you. Best of all the service is completely FREE! and often you can take advantage of our valuable in store promotional offers.

1. Add your items to your basket
2. Go to the checkout
3. Choose the store of your choice from the drop down delivery menu
4. Make the payment through our secure checkout
5. Wait for a collection email/phone call from our team

FREQUENTLY ASKED QUESTIONS

When can I collect my order?

For items in stock at the chosen collection store, we will normally have your item ready to collect within 1-2 working days.

For items which are at the warehouse your order will be ready to collect in the time indicated on the website; or if at another store approximately 3 to 5 working days – please call in advance if you are making a long journey, just in case!

If you order a bike we will contact you and arrange a collection appointment. All bikes go through a PDI (Pre-Delivery Inspection) delivered by one of our accredited mechanics, this means that getting your bike ready for collection may take a little longer.

How will I know when my order is ready?

For every order we will send you an e-mail to let you know when your order is ready to collect. If you've ordered a bike we will contact you once you have placed your order to arrange a collection time.

What do I need to collect my order?

Please bring with you your confirmation e-mail, a photo proof of ID (i.e. passport, driving licence), and proof of address.

We will hold your order in store for 10 days, if you have any problems with getting to the store to collect your order please feel free to contact the collection store and we will happily extend this time where possible.

Can Someone Else Collect My Order?

Please contact your chosen collection store in advance and we will do our best to accommodate any changes.


Mountain Bike Size Guide

Rider Height (FT/IN) Rider Height CM Suggested Frame Size
4'10" – 5'2"
147cm – 158cm
13" - 14" (X-Small)
5'2" – 5'6"
158cm - 168cm
15" - 16" (Small)
5'6" - 5'10"
168cm - 178cm
17" - 19" (Medium)
5'10" - 6'1"
178cm - 185cm
19" - 20" (Large)
6'1" - 6'4"
185cm - 193cm
21" - 22" (X-Large)
6'4" - 6'6"
193cm - 198cm
23" - 24" (XX-Large)

Road Bike Size Guide

Rider Height (FT/IN) Rider Height CM Suggested Frame Size
4'10" - 5'0"
148cm - 152cm
XX-Small (47cm - 48cm)
5'0" - 5'3"
152cm - 160cm
X-Small (49cm - 50cm)
5'3" - 5'6"
160cm - 168cm
Small (51cm - 53cm)
5'6" - 5'9"
168cm - 175cm
Medium (54cm - 55cm)
5'9" - 6'0"
175cm - 183cm
Large (56cm - 58cm)
6'0" - 6'3"
183cm - 191cm
X-Large (58cm - 60cm)
6'3" - 6'6"
191cm - 198cm
XX-Large (61cm - 63cm)

Hybrid Bike Size Guide

Rider Height (FT/IN) Rider Height CM Suggested Frame Size
4'10" – 5'2"
147cm – 158cm
13" - 14" (X-Small)
5'2" – 5'6"
158cm - 168cm
15" - 16" (Small)
5'6" - 5'10"
168cm - 178cm
17" - 19" (Medium)
5'10" - 6'1"
178cm - 185cm
19" - 20" (Large)
6'1" - 6'4"
185cm - 193cm
21" - 22" (X-Large)
6'4" - 6'6"
193cm - 198cm
23" - 24" (XX-Large)

Childrens Size Guide

Rider Age Rider Height Suggested Wheel Size
2 - 4
80cm - 100cm
12" Wheel
4 - 6
98cm - 106cm
14" Wheel
5 - 7
104cm - 115cm
16" Wheel
6 - 8
109cm - 122cm
18" Wheel
7 - 9
118cm - 130cm
20" Wheel
9 - 11
127cm - 145cm
24" Wheel
12+
145cm +
26" Wheel

MEN'S

XS

S

M

L

XL

XXL

XXXL

XXXXL

Chest (Inches)

35-37"

37-39"

39-41"

41-43"

43-45"

45-47"

47-49"

49-51"

Chest (CM)

89-94cm

94-99cm

99-104cm

104-109cm

109-114cm

114-119cm

119-124cm

124-129cm

Waist (Inches)

29-31"

31-33"

33-35"

35-37"

37-39"

39-41"

41-43"

43-45"

Waist (CM)

74-79cm

79-84cm

84-89cm

89-94cm

94-99cm

99-104cm

104-109cm

109-114cm

Gloves (CM)

7cm

8cm

9cm

10cm

11cm

12cm





WOMEN'S

XXS

XS

S

M

L

XL

XXL

Chest (Inches)

30-31"

32-33"

34-35"

36-37"

38-39"

40-41"

42-43"

Chest (CM)

77-80cm

81-86cm

87-90cm

91-95cm

96-100cm

101-105cm

106-110cm

Waist (Inches)

25-26"

27-28"

29-30"

31-32"

33-34"

35-36"

37-38"

Waist (CM)

64-67cm

68-72cm

73-78cm

79-83cm

84-87cm

88-92cm

93-97cm

Dress Size (UK)

6/8

8/10

10/12

12/14

14/16

16/18

18/20

Gloves (CM)

6.5cm

7cm

7.5cm

8cm

8.5cm

9cm

9.5cm


SOCKS AND OVERSHOES

S

M

L

XL

XXL

UK Size

5-6.5

7-8.5"

9-10.5"

11-12.5

13-14.5

EU Size

37-39.5

40-42

42.5-44.5

45-47

47.5-49.5

US Size

5.5-7

7.5-9

9.5-11

11.5-13

13.5-15


CHILDREN'S

XS

S

M

L

XL

EU Size

110-121m

122-133cm

134-145cm

146-157cm

158-164cm

UK Size

5-6yrs

7-8yrs

9-10yrs

11-12yrs

13-14yrs

Gloves

5.5cm

6cm

6.5cm

7cm

7.5cm



HELMETS

S/M

M/L

L/XL

EASY FIT S-M

EASY FIT L-XL

KIDS (ONE SIZE)

Circumference (INCHES)

20-22"

21.5-23.5"

23-25"

20-22.5"

22.5-25"

20-22"

Circumference (CM)

51-56cm

55-59cm

58-63cm

51-57cm

57-63cm

51-56cm


ARM / ELBOW COVERS

S-M

M-L

L-XL

Bicep Circumference* (CM)

up to 30cm

30-35cm

over 35cm

*Bicep circumference: Measure the full circumference of the bicep 14cm down the arm from the outer edge of the shoulder bone.



LEG / KNEE COVERS

S-M

M-L

L-XL

Thigh Circumference** (CM)

up to 52cm

52-60cm

over 60cm

Thigh Circumference** (CM)

up to 57cm

over 57cm

**Thigh circumference: Measure the full circumference of the thigh 10cm down from the crotch.



MT500+ OVERSHOE

S/M

M/L

L/XL

XL/XXL

UK SIZE

5-6

7-8

8.5-9.5

10-11

EU SIZE

37-39

40-41

42-43

44-45

US SIZE

5.5-6.5

7.5-8.5

9-10

10.5-11.5


FOOTWEAR

UK SIZE

5

6

6.5

7

7.5

8

8.5

9

9.5

10

10.5

11

12

EU SIZE

38

39

40

41

42

42.5

43

44

44.5

45

46.5

46

47

US SIZE

6

7

7.5

8

8.5

9

9.5

10

10.5

11

11.5

12

13



Finance* from £67.42 per month

*subject to status, minimum spend applies


Click here for full details.

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Finance Illustrations

Other finance options may be available to you at checkout. All finance is subject to status, minimum spend applies.
Low Rate Credit 12 Months (14.9% APR Representative)
(Minimum goods total £339.00)
Cash Price£899.00
Minimum Deposit10%
Deposit to Pay£89.90
Loan£809.10
Duration (Months)12
12 Monthly Payments of£72.64*
Cost of Credit£62.58
Rate of Interest (fixed)14.9%
APR Representative14.9% APR Representative
Total Amount Payable£961.58
12 Months Classic Credit (9.9% APR Representative)
(Minimum goods total £339.00)
Cash Price£899.00
Minimum Deposit10%
Deposit to Pay£89.90
Loan£809.10
Duration (Months)12
12 Monthly Payments of£70.94*
Cost of Credit£42.18
Rate of Interest (fixed)9.9%
APR Representative9.9% APR Representative
Total Amount Payable£941.18
Lowest monthly payment12 Months Interest Free Credit (0% APR Representative)
(Minimum goods total £399.00)
Cash Price£899.00
Minimum Deposit10%
Deposit to Pay£89.90
Loan£809.10
Duration (Months)12
12 Monthly Payments of£67.42*
Cost of Credit£0.00
Rate of Interest (fixed)0%
APR Representative0% APR Representative
Total Amount Payable£899.00
*Final payment may be slightly higher or lower than quoted: this will be made clear in your loan documents prior to you signing the agreement
Note: Selecting other items in our site may affect which finance options are available to you. Add your preferred items to your basket and visit the checkout. You can see which options your selected products qualify for before giving us any personal details.

Representative example

Cash price £2000.00, Deposit £200.00. Total amount of credit £1800.00 over 24 months with an annual interest rate of 0% (Fixed). Monthly repayments will be £75.00 with a total repayable of £2000.00. 0% APR representative.
The above representative example shows the finance information that we expect to apply to more than half of accepted applications for the specific amount and repayment term.

Representative example

Cash price £2000.00, Deposit £200.00. Total amount of credit £1800.00 over 36 months with an annual interest rate of 9.9% (Fixed). Monthly repayments will be £57.65 with a total repayable of £2275.40. 9.9% APR representative.
The above representative example shows the finance information that we expect to apply to more than half of accepted applications for the specific amount and repayment term.

Representative example

Cash price £2000.00, Deposit £200.00. Total amount of credit £1800.00 over 48 months with an annual interest rate of 14.9% (Fixed). Monthly repayments will be £49.16 with a total repayable of £2559.68. 14.9% APR representative.
The above representative example shows the finance information that we expect to apply to more than half of accepted applications for the specific amount and repayment term.
JC Cook Cycles is a credit broker, not a lender and is authorised and regulated by the Financial Conduct Authority, (FRN 786547). We do not charge you for credit broking services.
Credit is provided by Novuna Personal Finance, a trading style of Mitsubishi HC Capital UK PLC, authorised and regulated by the Financial Conduct Authority. Financial Services Register no. 704348. The register can be accessed through http://www.fca.org.uk.
Credit subject to status, UK only 18+
Missed or late payments will result in fees and additional interest on your loan and can also affect your credit file and your ability to obtain credit in the future.
Credit is provided by Novuna Personal Finance, a trading style of Mitsubishi HC Capital UK PLC, authorised and regulated by the Financial Conduct Authority. Financial Services Register no. 704348. The register can be accessed through http://www.fca.org.uk.
As with any product, specification is subject to change without prior notification. You are advised to confirm current specification before buying.
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