Clothing Size Guide

2XU KIDS

CHEST WAIST HEIGHT AGE
SMALL 63-68 57-62 130-138 6-7
MEDIUM 69-74 63-69 140-148 8-10
LARGE 75-80 70-75 150-156 10-12
X LARGE  81-86 76-81 158-165 14-16

ZONE 3 KIDS

WEIGHT HEIGHT AGE
SMALL 26-32kg 126-136 8-10
MEDIUM 30-40kg 132-147 10-12
LARGE 40-50kg  146-162 12-14

ZONE 3 WOMENS

CHEST WEIGHT HEIGHT WAIST
X SMALL 71-81 45-55kg 152-163 61-66
SMALL 76-86 50-60kg 157-168 66-74
MEDIUM 86-97 60-70kg 163-175 76-81
LARGE 91-102 65-75kg  168-183 81-91
X LARGE 91-107 70-80kg  168-183 81-97

ZONE 3 MENS

CHEST WEIGHT HEIGHT WAIST
X SMALL 81-86 54-60kg 157-170 66-76
SMALL 86-97 62-72kg 168-178 71-76
MEDIUM 91-102 68-78kg 170-185 79-84
LARGE 102-112 78-86kg  175-188 86-97
X LARGE 112-122 78-86kg  178-196 91-102

ZOOT KIDS

CHEST WAIST HIPS AGE 
SMALL 66-68.5 58.5-62 67-72.5 6-7
MEDIUM 71-76 62-66 72.5-79 8-10
LARGE 76-79 66-68.5 79-84 12-14

ZONE 3 KIDS

WEIGHT HEIGHT AGE
SMALL 26-32kg 126-136 8-10
MEDIUM 30-40kg 132-147 10-12
LARGE 40-50kg  146-162 12-14

ZONE 3 WOMENS

CHEST WEIGHT HEIGHT BODY TYPE
XS 79-84 46-53kg 147-163 X Small
S 84-89 54-61kg 160-168 Small
SM 91-97 60-70kg 157-168 Small Medium
ST 84-91 54-64kg 170-183 Small Tall
MEDIUM 89-94 60-67kg 165-178 Medium
LARGE 94-99 68-78kg  168-183 Large
X LARGE 99-107 73-83kg  168-198 81-97

FUNKIER KIDS

CHEST HIPS HEIGHT INSIDE LEG
6-8 70 74 110-116 66
8-10 74 76 120-126 72
10-12 78 80 132-138 77
12-14  84 82 144-150 80

HUP KIDS

CHEST WAIST HEIGHT AGE
SIZE 1 63-68 57-62 116-125 6-7
SIZE 2 69-74 63-69 126-135 7-8
SIZE 3 75-80 70-75 135-143 8-9
SIZE 4 81-86 76-81 143-150 9-10
SIZE 5 87-92 93-98 151-157 11-12
SIZE 6 93-98 87-92 158-163 13-14

SHREDXS KIDS

CHEST WAIST LEG LENGTH AGE
XXS 38 51 41 4
XS 40 56 43 6
S 42 71 45 8
M  45 73 47 10
L  47 75 49 12
XL  49 78 52 13
XXL  51.5 82 55 14

POLARIS KIDS

CHEST HIPS HEIGHT AGE
SMALL 57-61 58-65 116 5-6
MEDIUM 62-66 66-70 128 7-8
LARGE 69-72 71-78 140 9-10
X LARGE  75-80 79-85 152 11-12

ZOGGS

CHEST WAIST HEIGHT AGE
18 51 46 80 1 year
19 53 48 92 2 years
20 56 51 98 3 years
21  58 53 104 4 years
22  61 56 110 5 years
23  66 58 116 6 years
26  55 56 116 6-7 yrs
28  71 57 128 8-9 yrs
30  76 58 140 10-11 yrs
32  81 61 152 12-13 yrs
34  86 64 160 14-15 yrs

Bike Size Guide

The best way to size your rider’s new bike is by Inside Leg measurement.

By all means supplement with height and age as a guide, but Inside Leg is more accurate as there is a large spread of leg lengths/heights for each age. This is easy and only takes a few seconds;

  • Stand your rider in socks against a wall
  • Put a small book between their legs (like a saddle, high as comfortable) and against the wall
  • Ask your rider to move away, measure from the top of the book to the floor, using cm or inches.

We list a Minimum Inside Leg dimension for all our kids race bikes, on each product page. We measure our bikes from the floor up to the top-tube, in-front of the saddle, then minus 2cm for shoes... 

 

Bike Buying Guide

As we custom-build all our bikes, you have a chance to create any specification you require, to fit your rider. Here are a few tips, but if in doubt, refer to our Standard Build bike products or drop us an email...

1. Which Model?

HUP evo: this frameset can build a variety of bikes in either Drop bar or Flat bar, including: Cyclocross, Gravel AdventureRoad, Triathlon or MTB XC - as the frame can run narrow road tyres or wider off-road tyres, on Disc brakes.

HUP straatrace: this frameset can build bikes for: Road racing, leisure Road cycling or tarmac Triathlon - as the frame is limited to narrow Road tyres using it's Caliper brakes.

HUP azure: this frameset can build bikes for Velodrome track cycling only - as the frame is limited to narrow Road tyres and cannot accept a rear mech or brakes.

2. Which Groupset/Gearing?

This choice will depend on what you intend to use the bike for, alongside the relevant strength of your rider (for chainring selection). Obviously your budget, compatibility with other bikes in your household and secondary uses will also have a bearing! Our recommendations...

Cyclocross: 11-speed Microshift XCD or 11-speed SRAM Rival
Gravel Adventure: 9 or 10-speed Micrsoshift Advent or 11-speed Microshift XCD
Road Racing: 10-speed Microshift R10 or 11-speed SRAM Rival (gearing governed by BC regs)
Road Leisure: 8 or 9-speed Microshift R8 or R9
Triathlon: 10-speed Microshift R10 or 11-speed SRAM Rival (gearing governed by BT regs)
MTB XC: 9-speed or 10-speed Micrsoshift Advent or 11-speed Microshift XCD

For chainring selection (BC/BT racing regs) see guidance HERE. For other uses refer to our Standard Build bike products for a starting point. Parents often over-estimate the most suitable chainring size, for example, U10 cyclocross is best on a 30T chainring - but often a 34T is ordered!

3. Which Components?

The size of your rider dictates the best components. Here are a few tips on selection...

Drop Handlebars: match the approx shoulder width for Road, or shoulder width +1 size up for Cyclocross
Flat Handlebars: match the approx width of their press-up position

Cranks: take 10% of their height +5mm for crank length (Road & Triathlon cycling) or 10% of their height +10mm for crank length (Off-Road cycling). Example: 1350mm tall rider would choose 140mm for Road bike or 145mm for CX/MTB.

Stems: This isn't an exact science, but generally if the rider is at the lower end of the frameset's growth range, a shorter stem will be correct and vice-versa.

Saddle/Post: Our kids saddle is suited to younger riders and the Youth saddle for older riders (or younger riders Off-Road). But saddles are a personal thing. We have 2 choices of seat post, inline or rotary, the later is very useful for smaller riders at the lower end of the frameset's growth range being reversible to reduce the bikes effective length.

4. Which Wheels/Tyres/Brakes?

Your choice of wheels/tyres will be based on budget and use. The more you spend, the lighter they are, which is the single biggest improvement to any bike, but especially true for children. Tyres will be use specific: smooth/narrow for Road, knobbly/wide for Cyclocross or knobbly/very wide for MTB.

The HUP evo takes either 700c or 650b. For Road, Cyclocross, Triathlon and Road leisure, we recommend 700c for both practicality and racing regulations. For Gravel Adventure, MTB or general off-road riding, 650b wheels & tyres offer larger sizes for increased comfort, grip and off-road relaiability. The HUP straatrace & azure work with 700c only.

Brakes are often over-specified for kids, but usually 140mm front & rear for CX/Road/Triathlon, moving to 160mm front & 140mm rear from approx 11yrs+ and for Gravel adventure 160mm front & rear is plenty. On dedicated MTB bikes 180mm front & 160mm rear from approx 11yrs+ is typical. Hydraulics give more power (at a price) however that's not always a benefit to a 30kg rider in the wet, generating very little weight on their wider tyres, especially in cyclocross.

5. Which Product?

You can choose from a fully built bike, a self-build bundle or a frameset. Here are a few tips on choosing...

Fully Built Bike: you can order a Standard Build or a Custom Build bike, which is delivered in a large box, requiring just the handlebars to be turned/fitted and the front wheel to be refitted. Shipping is more expensive (only available within Europe) and the current build queue times are HERE.

Self-Build Bundleyou can order a kit containing all parts to build the bike yourself, or by your local bike shop. This is our most popular method, with shipping is more cost effective (great for overseas customers) and you can save money. You can also order without a wheelset if you already have one, saving more money. Build queue times are HERE.

Framesetorder a frameset to build using your existing components or our child-specific parts that you may require.

6. Which Size?

Refer to the size chart above, referencing their Inside Leg and Height. This is the most effective method of sizing. If you know how to interpret it, our geometry chart is below...

HUP evo:

37cm: Seat Tube 37cm | VTT 49.5cm | Reach 35.3cm | Stack 50.5cm | HT 90mm | HT Angle 69 degrees
44cm: Seat Tube 44cm | VTT 50.5cm | Reach 36cm | Stack 51.6cm | HT 100mm | HT Angle 70 degrees
48cm: Seat Tube 48cm | VTT 51.8cm | Reach 37.2cm | Stack 51.7cm | HT 105mm | HT Angle 70.5 degrees

HUP straatrace:

37cm: Seat Tube 37cm | VTT 49.5cm | Reach 35.3cm | Stack 48.5cm | HT 90mm | HT Angle 70 degrees
44cm: Seat Tube 44cm | VTT 50.5cm | Reach 36.3cm | Stack 49.5cm | HT 100mm | HT Angle 70 degrees
48cm: Seat Tube 48cm | VTT 51.8cm | Reach 38cm | Stack 50.6cm | HT 105mm | HT Angle 72 degrees

HUP azure:

37cm: Seat Tube 37cm | VTT 49.5cm | Reach 37.7cm | Stack 47.2cm | HT 90mm | HT Angle 71 degrees
44cm: Seat Tube 44cm | VTT 50.5cm | Reach 38.5cm | Stack 48cm | HT 100mm | HT Angle 71 degrees
48cm: Seat Tube 48cm | VTT 51.8cm | Reach 39.6cm | Stack 49cm | HT 105mm | HT Angle 72 degrees

Take a look at our unique range of bikes here...

Cyclocross | Road | Triathlon | MTB | Gravel Adventure | Track | Self-Build | Framesets