HUP Kids Cranks: Children's Short Cranksets (104bcd 4-bolt) Narrow Q-Factor

£60.00 GBP

Finally, lightweight and short cranks for kids with a narrow Q-factor and a 104bcd 4-bolt layout for chainrings from 30T to 42T. These HUP Kids Cranks are probably the most important component you will fit to your child's bike!

Get it wrong and they lose pedal power and risk injury from crank arms that are too long or wide. Get it right, and they will spend many happy hours in the saddle and maximise their little leg power!

Available in a variety of popular lengths to fit junior/youth riders from age 6 to 14 approx. Compatible with any JIS square-taper bottom bracket, they are cold-forged from 6061-T6 aluminium for strength, low weight and durability.

These cranks are perfect for Road Racing, Cyclocross, Triathlon, BMX or MTB with the appropriate bottom brackets and single chainring, which can be mounted inboard or outboard of the mounting flange to suit chainline requirements.

Sizing Guide:

130mm: riders approx 120cm to 135cm tall
135mm: riders approx 125cm to 140cm tall
140mm: riders approx 130cm to 145cm tall
145mm: riders approx 135cm to 150cm tall
150mm: riders approx 140cm to 155cm tall
155mm: riders approx 145cm to 160cm tall

  • HUP Kids Cranks
  • Chainring BCD: 104mm, 4-bolt
  • Installation: Single Chainring
  • Aluminum 6061-T6
  • Bottom Bracket: JIS square-taper
  • Arm Lengths:  130mm, 135mm, 140mm, 145mm, 150mm & 155mm
  • Chainline: 45.3
  • Q-Factor (with 107 BB): 145mm
  • Weight: 440g
  • Colour: Black
  • Does not include crank arm bolts, available separately

Top Tip: as with all our kids cranks, we always add helicopter tape to the face of the crank arms to protect from kids feet rubbing (especially without cleats) when the cleat position sets the shoes very close to the cranks.

If using HUP cranks on a non-HUP frame, use the dimensions below to check for fit on your frames chainstays...

103mm BB = approx 115mm inside crank arms
107.5mm BB = approx 121mm inside crank arms
108mm BB = approx 122mm inside crank arms
113mm BB = approx 127mm inside crank arms
115mm BB = approx 129mm inside crank arms
118mm BB = approx 132mm inside crank arms
122.5mm BB = approx 136mm inside crank arms
127.5mm BB = approx 140mm inside crank arms

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