Marin San Quentin 24w 2021 - Junior Bike

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Product Description

The San Quentin 24 and 20 is for the kid looking to explore everything an offroad bike can do from singletrack to park rides to just cruising the neighborhood in style.

Occasionally, without notice, manufacturers change product design and/or specifications.

Specification

Frame:Series 2 6061 Aluminum, 24” Wheels, Disc Specific, 135mm Dropouts
Fork:RockShox Judy Silver TK, 100mm Travel, Solo Air, 110x15mm Maxle Stealth
Headset:FSA No. 57E
Stem:Marin Alloy
Bars:Marin Riser, 31.8 clamp, 30mm Rise, 590mm Width
Front Brake:Shimano BR-MT201 Hydraulic, 160mm Rotor
Rear Brake:Shimano BR-MT201 Hydraulic, 160mm Rotor
Rear Mech:MicroSHIFT Advent 9-Speed
Shifters:MicroSHIFT Advent 9-Speed
Speed:9
Rims:Marin, Double Wall Alloy, 27mm Internal
Front Hub:Forged Aluminum, 32H, Disc Specific
Rear Hub:Forged Aluminum, 32H, Disc Specific
Spokes:14g Black Stainless Steel
Front Tyre:Vee Tire Crown Gem, 24”x2.6”, Wire Bead
Rear Tyre:Vee Tire Crown Gem, 24”x2.6”, Wire Bead
Seat Post:Marin Alloy, 30.9mm
Saddle:Marin Kids MTB
Chainset:Forged Alloy, Narrow Wide 30T, 152mm
Bottom Bracket:Sealed Cartridge Bearings, Square Taper
Chain:KMC X9
Cassette:MicroSHIFT 9-Speed, 11-46T
Pedals:Included

San Quentin Sizing

San Quentin Sizing

See the table below to find the right size Marin San Quentin.

Height

Size

4’8” / 143cm

XXS

 

 

 

 

 

 

4’9” / 145cm

XXS

 

 

 

 

 

 

4’10” /  148cm

 

XS

 

 

 

 

 

4’11” / 150cm

 

XS

 

 

 

 

 

5’0” / 152cm

 

XS

 

 

 

 

 

5’1” / 155cm

 

XS

S

 

 

 

 

5’2” / 158cm

 

 

S

 

 

 

 

5’3” / 160cm

 

 

S

 

 

 

 

5’4” / 163cm

 

 

S

 

 

 

 

5’5” / 165cm

 

 

S

M

 

 

 

5’6” / 168cm

 

 

 

M

 

 

 

5’7” / 170cm

 

 

 

M

 

 

 

5’8” / 173cm

 

 

 

M

 

 

 

5’9” / 175cm

 

 

 

M

L

 

 

5’10” / 178cm

 

 

 

M

L

 

 

5’11” / 180cm

 

 

 

 

L

 

 

6’0” / 183cm

 

 

 

 

L

XL

 

6’1” / 185cm

 

 

 

 

L

XL

 

6’2” / 188cm

 

 

 

 

 

XL

 

6’3” / 191cm

 

 

 

 

 

XL

XXL

6’4” / 193cm

 

 

 

 

 

 

XXL

6’5” / 196cm

 

 

 

 

 

 

XXL

6’6” / 198cm

 

 

 

 

 

 

XXL

Read our bike size guide for more information on sizing.

 

San Quentin Geometry

Size

S

M

L

XL

Stack

586.1

590.7

599.7

604.3

Reach

 

422

444

464

484

Head Tube Angle

65

65

65

65

Head Tube Length

105

110

120

125

Seat Tube Angle (Virtual)

75

75

75

75

Seat Tube Angle (Actual)

75

75

75

75

Seat Tube Length

385

420

475

515

Top Tube (Actual)

564

582

604

626

Top Tube (Effective)

579.1

602.3

624.7

645.9

Bottom Bracket Height

310

310

310

310

Bottom Bracket Drop

50

50

50

50

Chain Stay

425

425

425

425

Wheelbase

1144.8

1168.9

1193.1

1215.3

Standover Height

664

677

714

745

Fork Offset

46

46

46

46

Seatpost Diameter

30.9

30.9

30.9

30.9

Handlebar Width

780

780

780

780

Stem Length

45

45

45

45

Crank Length

170

175

175

175

Read our Mountain Bike Geometry Explained guide for more information on MTB geometry. 

Please note, all size information is provided as a guide - if you're unsure or need any further assistance you can call us on 01792 799508 ... we're happy to help!

Junior Bike Guide

 

Junior Bike Guide

Who are junior bikes for?

Junior bikes bridge the gap between kids bikes and adult bikes. With 24” wheels junior bikes are ideal for children who are over 135cm (4’ 4”) tall, which is usually around the age of ten years. Junior bikes are much like scaled down adult bikes with a wide range of gears and powerful brakes. Like adult bikes, junior bikes are available in different styles. Hardtail mountain bikes are most popular, but you can also get full-on road bikes with drop handlebars, relaxed hybrids with baskets on the front and even mini full suspension MTBs.

Which is the best junior bike for my child?

The best junior bike for your child will depend on what type of cycling they like doing. Most kids at this age will not have settled on a specific cycling discipline, which is why hardtail junior mountain bikes are most popular as they offer all-round performance. Hardtail junior bikes, with flat handlebars, are a great choice for cycling around the local area on roads and cycle paths as well as off-road trails. These bikes are also ideal for Bike Ability cycle training as they are the easiest to ride.

If your child is a keen mountain biker or roadie then a junior road bike or higher spec MTB will be a better choice.

If your child is a keen mountain biker or roadie then a junior road bike or higher spec MTB will be a better choice.

What are the things to look for in a junior bike?


Frame and Fork

The best junior bike frames are built from aluminium alloy. This material is lightweight and robust, making it perfect for all types of junior cycles. Steel frames are just as strong as alloy, but are significantly heavier making them harder for youngsters to ride. Rigid forks are best for road cycling with aluminium alloy forks being lighter weight than steel ones.

Rigid forks are also good for light off-roading, but a suspension fork will give a smoother ride on rough surfaces. For proper off-road tracks a suspension fork is ideal.

For proper off-road tracks a suspension fork is ideal.

Wheels and Tyres

While all junior bikes have 24 inch wheels, the tyres vary quite a lot and this makes a big difference to how the bikes ride. Generally speaking the narrower a tyre is the faster it will roll, and the wider a tyre is the more grip it will offer. This means that wider tyres are better for off-roading while narrower tyres are better for tarmac cycling.

Wider MTB style tyres will have a knobbly tread pattern that offers grip on loose off-road surfaces. However the tread patterns are fairly shallow, so they still roll reasonably quickly on the road.

Common Junior Tyre Sizing Chart

Tyre Width

Best For

1.125”

Rapid road cycling

1.75”

General road cycling

1.95”

Road and off-road cycling

2.1” up

Off-road trails and gravel tracks

While all junior bikes have 24 inch wheels, the tyres vary quite a lot and this makes a big difference to how the bikes ride. Generally speaking the narrower a tyre is the faster it will roll, and the wider a tyre is the more grip it will offer. This means that wider tyres are better for off-roading while narrower tyres are better for tarmac cycling.

Wider MTB style tyres will have a knobbly tread pattern that offers grip on loose off-road surfaces. However the tread patterns are fairly shallow, so they still roll reasonably quickly on the road.

Common Junior Tyre Sizing Chart

Tyre Width

Best For

1.125”

Rapid road cycling

1.75”

General road cycling

1.95”

Road and off-road cycling

2.1” up

Off-road trails and gravel tracks

 

 


Gears

Most junior bikes feature derailleur gears to make cycling up and down hills easier. However more gears aren’t necessarily better. Bikes listed as having more than 10 gears usually feature double front chainrings, which many kids find difficult to manage. Single front chainrings with 6, 7, 8 or 9 speed cassettes are easier to use, especially on mountain and hybrid bikes, and still provide plenty of gear options for the climbs.

Road bike style junior bikes usually have double chainrings like their adult counterparts. These bikes are ideal for keen young road cyclists who want the performance of an adult bike.

Single front chainrings with 6, 7, 8 or 9 speed cassettes are easier to use.

Brakes

Like adult bikes, there are two types of brakes on junior bikes:

Rim brakes are the most affordable option and offer good stopping control, especially in dry weather conditions.

Disc brakes are becoming more popular and offer a big advantage over rim brakes as they work equally well in both wet and dry conditions. Hydraulic disc brakes are the most powerful and are easiest to use.

Rim brakes are the most affordable option and offer good stopping control.

Getting the Right Fit

Once you have chosen the correct size bike using the kids bike size tab information on the product page there are a couple of adjustments that you can make to get the perfect fit for your child.

Saddle Height

If your child is relatively unexperienced, then set the saddle height so that they can put both feet flat on the ground. This will give them the confidence to stop and start whenever they like and reduce the chances of them falling off. Once they are comfortable on the bike you can move the saddle up for a more efficient cycling position. See our saddle height-how to for step by step instructions.

If your child is relatively unexperienced, then set the saddle height so that they can put both feet flat on the ground.

Brake Reach

It is important that your child can reach the brakes easily without having to stretch their hands or unhook their thumb from the handle bars. It’s easy to adjust the reach of the brake levers and move them closer to the handlebars allowing them to brake more easily. Most brake levers have a small screw that moves the brake lever closer to the bars, all you need is a small screwdriver or allen key to do this. Some premium junior bikes even have a tool free reach adjustment nob. You may also need to adjust the brake cable tension with the barrel to get the brakes working optimally for your child.

It is important that your child can reach the brakes easily without having to stretch their hands.

Handlebar Height

While this is less important than saddle height, you can also adjust the handlebar height on junior bikes. This is easily done by repositioning the spacers (on a A-headset) or by loosening the expander bolt and repositioning the stem before retightening (on a quill stem). Start with the stem in its lowest position then move it higher it as they grow to maintain the ideal riding position.

Start with the stem in its lowest position then move it higher it as they grow to maintain the ideal riding position.

Bike Weight

After sizing, weight has the biggest impact on your child’s enjoyment while cycling. To understand why, remember that an adult bike can weigh around 20% of your body weight. Most kid's bikes can weigh up to a hefty 50% of their weight. Imagine strapping concrete blocks to your pedals and start riding, it wouldn’t be a nice experience. Generally speaking, the more you spend on a junior bike, the lighter it will be. This means the bike is easier to handle and manoeuvre, and that translates directly into fun and enjoyment.

Finance

How do I apply for finance?

Spend £99 or more at Tredz and you can spread the cost. Pay monthly over 6-48 months, interest free (dependent on repayment terms and amount).

1Fill your basket with everything you want from Tredz and go to the checkout.

2During checkout, select the finance option you want as your method of payment.

3You will be sent to our finance provider's secure server to complete your application.

4Finance providers PayPal & V12 will use the information provided to make a decision and complete checkout if you are approved.

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V12 Representative Example: If total purchase price is £1,399.00 with a deposit of £139.90 (10%) and your selected term is 36 months Classic Credit 15.9% APR Representative (interest rate 8.17% fixed), you would pay £43.55 per month. Total amount of credit will be £1259.10 with a cost of credit of £308.70 after a deposit of £139.90. Total amount payable is £1707.70, subject to terms and status.
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Delivery & Guarantee

UK Delivery Information

International Deliveries – Temporarily Suspended 11/11/20

Note: We are still offering deliveries to the Isle of Man, Scottish Highlands, Scottish Islands, Channel Islands, Isle of Wight, Jersey and Guernsey. 

Courier Delivery update: Due to the COVID19 situation, we are currently experiencing some delays with deliveries. Our couriers are working around the clock to get your order to you as soon as possible but there is a potential delay of up to 48 hours . Please check your tracking on track your order here.

Please download the TNT Track and Trace App for iOS here and Android here so you can keep an eye on your delivery and any further updates.

Please note on the TNT tracking app it may show your delivery status as ‘Collecting’ (as per image below). This means your delivery has left our warehouse and is currently held at TNT main depot and there could be up to a 48 hour delay.

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Please keep checking the TNT tracking for further updates. On behalf of TNT we apologise for any delay and inconvenience this may cause. 

We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE in the UK, regardless of the size and on all orders over £20.

Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.

Please note that Pre-Order dates can sometimes change due to updated stock information.

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Returns & Warranty

It's easy to return a product with our 365 day, hassle free returns. 

We will give you a full refund on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).

Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.

If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.

For more information please visit our Returns & Warranty page.

What's In The Box

What's In The Box

As cyclists ourselves, we know you will be keen to get out on your new bike as soon as possible. That's why we provide you with all the essential kit you need to get your shiny new bike rolling for the first time.

Most bikes don't come with pedals as standard so we include a set of basic pedals, free of charge with every bike we send out. We will also provide you with a pedal spanner to fit them and a 9-key trail tool, along with full instructions for setting your bike up out of the box. Each bike is sent out with a 16 point, quality control check sheet so you can be confident that your bike has been fully checked by our qualified mechanics.

What's in the box
  • Basic setup instructions
  • 16 point quality control checklist
  • Free tredz multitool
  • Free tred pedal spanner
  • Free basic pedals
  • Free drawstring kit bag
  • Free bike insurance voucher

All these items are provided at no extra charge and are packed into a Tredz drawstring bag that doubles up as a handy backpack for carrying your ride essentials.

  • Basic bike setup instructions
  • Free ‘basic’ pedals
  • Free Tredz pedal spanner
  • Free Tredz 9-key trail tool
  • Free Tredz drawstring bag
  • Free 8 weeks insurance voucher
  • 16 point, quality control check sheet

Tredz Service:

Tredz bikes are fully built & set up to ride
Read our bike setup guide.

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  • 0% APR finance available on any basket over £99
  • 365 day 'no hassle' returns
  • Free UK delivery, on a date that suits you

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