Boardman JNR 20" 2025 - Kids Bike
OK, so they've mastered balance; they've conquered pedalling. Now it's time to step things up with the Boardman JNR 20” kids bike, get them going faster, and experience more of their surroundings. As with the rest of the JNR range", the JNR 20" takes inspiration from the adult HYB range with a focus on lightness and easy, intuitive handling.
Key features:
- Lightweight Triple butted, smooth weld aluminium frame
- smooth weld aluminium lowers with Chromo Steerer forks
- Tektro mini v-brakes fit smaller hands better and offer low maintenance braking
- Weighs just 8.6kg
- Size: 20” wheel
- Colours: Orange
- The Boardman JNR 20" is available with 0% APR finance
Forwards, Faster, Further - three words that encapsulate the Boardman ethos and influence every product Boardman have made. These three words represent the vast spectrum of our rider's cycling ambitions and goals, which Boardman want to support them in achieving, however big or small they are.
When it comes to riding bikes, kids are constantly pushing forwards, riding faster and exploring further. So when designing our first full range of junior bikes, Boardman have put Forwards, Faster, Further on each bike to keep the childlike joy and freedom of pushing the boundaries on a bike at the front of our minds.
The JNR range comprises six models, each with the goal of getting kids outside, cycling and exploring whilst supporting their developmental progression. From those first freewheeling forward movements on the 12" balance bike to the pride of mastering pedalling and going faster than before on the 20", to a family adventure venturing further on the 26", we've carefully considered every aspect of each bike's fit and function. Function hasn't come at the expense of form though, hidden welds and premium metallic paint finishes help the bikes to look as good as they ride.
Our goal is to ensure that the simple act (after some practice) of riding a Boardman JNR is as fun and empowering as possible.
A light, triple-butted alloy frame and alloy fork make the bike easy to pedal and balance. Ample standover clearance and a long wheelbase mean the bike is easier to get on and off and more stable and predictable when riding. Short-reach brake levers make mastering the art of slowing down a breeze.
The addition of a seven-speed Shimano gearing opens up so many possibilities. That school run that was just a little too far or too hilly is now within reach. Those Bikeability sessions will be a breeze, and with belief in their bike and ability, there'll be no stopping them from getting out and exploring.
All Tredz bikes are:
- Fully built & ready to ride
- Fully checked & tested by Cytech qualified mechanics
- Available with 0% APR finance on any basket over £99
- UK price match guarantee
- 365 day no hassle returns
- Free delivery in the UK Mainland on a date that suits you
In the box with every Tredz bike is:
- Free Tredz 9 key trail tool
- Free Tredz pedal spanner
- Free basic pedals
- Tredz drawstring kit bag
- 16 point quality control check sheet
- Basic bike setup instructions
- Free Cycle Plan insurance voucher
Occasionally, without notice, manufacturers change product design and/or specifications.
Frame | Lighhtweight Triple butted, smooth weld aluminium |
Fork | 1" Triple Butted, smooth weld aluminium lowers with Chromo Steerer |
Headset | Semi-Inegrated NECO H124 1" Aheadset |
Stem | Boardman JNR Alloy 50mm - 10 degree rise |
Bars | Boardman JNR Alloy - 25.4mm - 500mm wide |
Front Brake | TEKTRO J310 mini V-Brake |
Rear Brake | TEKTRO J310 mini V-Brake |
Brake Lever | TEKTRO, JL-510 short reach |
Rear Mech | Shimano M310-RD 7 Speed |
Shifters | Shimano SL-M315 7 Speed |
Speed | 7 |
Rims | Double Wall Alloy |
Front Hub | Formula Alloy QR |
Rear Hub | Formula Alloy QR |
Spokes | Steel - Black |
Front Tyre | Vee Rubber, Speedster 20" x 1.5" |
Rear Tyre | Vee Rubber, Speedster 20" x 1.5" |
Seat Post | Boardman JNR Alloy 25.4mm x 250mm |
Saddle | Boardman JNR |
Chainset | Prowheel 32 Tooth - 115mm crank and double chainguard |
Bottom Bracket | FSA. - BB-7420ST |
Chain | KMC Z7 |
Cassette | Shimano MF-TZ500 7 Speed 14-28 Tooth |
Pedals | Wellgo 9/16" |
Weight | 8.6 KG |
Junior Bike Size Chart
Approx. Age |
Height (cm) |
Type / Wheel Size |
1 - 4 |
77 – 105cm |
Balance |
2 - 4 |
85 – 105cm |
12" |
4 - 6 |
105 – 117cm |
14" |
5 - 7 |
112 – 125cm |
16” |
6 - 8 |
117 – 132cm |
18” |
7 - 10 |
125 – 136cm |
20” |
10+ |
136+cm |
24” |
Read our kids bike size guide for more information on kids bike sizing.
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