SKU: 6060049967

HUP 2-Piece MTB Cranks: hollow axle (3-bolt DM) short cranks

$56.25 $62.50
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Ships within 48 hours · Estimated delivery Jul 27 - Aug 1

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Description

HUP 2-Piece MTB Cranks: hollow axle (3-bolt DM) short cranksLightweight hollow axle cranks to fit any frame! These HUP 2 piece MTB cranks are probably the most important component you will fit to your bike. Get it wrong and you will lose pedal power and risk injury from crank arms that are too long. Get it right, and you will spend many happy hours in the saddle and maximise your leg power! Available in a variety of popular lengths to fit youth and adult riders from age 7+ Compatible with 24mm Shimano type

Lightweight hollow axle cranks to fit any frame! These HUP 2-piece MTB cranks are probably the most important component you will fit to your bike.

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

Available in a variety of popular lengths to fit youth and adult riders from age 7+ Compatible with 24mm Shimano type external bottom brackets, they are cold-forged from 6061-T6 aluminium for strength, low weight and durability.

These cranks are perfect for MTB, DJ or BMX running an MTB axle, with the appropriate bottom brackets and single chainring...

Sizing Guide: 

125mm: riders approx 115cm to 130cm tall
135mm: riders approx 125cm to 140cm tall
145mm: riders approx 135cm to 150cm tall
155mm: riders approx 145cm to 160cm tall
165mm: riders approx 155cm to 170cm tall
170mm: riders approx 170cm+ tall

  • HUP 2-piece hollow axle cranks
  • Chainring fitment: 3-bolt SRAM direct mount
  • Installation: Single chainring
  • Axle type: 24mm
  • Aluminum 6061-T6
  • Bottom Bracket: 24mm Shimano
  • Arm Lengths:  145mm, 155mm, 165mm & 170mm
  • Chainline: 48mm (6mm offset chainring), 51mm (3mm offset chainring)
  • Installation: 2x pinch bolts torque to 15Nm
  • Q-Factor: 173mm
  • Weight: from 565g (arms and axle)
  • Colour: Black
  • Max rider weight: 90kg
  • Does not include BB or chainring - available separately

Top Tips: 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. Fitting to the HUP xc 13"-19" (73mm shell, boost) use the 2mm spacer on the DS cup and a 3mm offset chainring. Fitting to the HUP xc20/24 (73mm shell, non-boost) use the 1mm spacer on the DS cup and a 6mm offset chainring. However, frame tolerances may override these - so ensure you use the correct spacers to acheive your correct chainline and crank arm spacing!

If using HUP cranks on a non-HUP frame, use the dimensions below to check for fit on your frames chainstays...width of inside of arms = approx 146mm. More install info here.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 6060049967

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4.8 ★★★★★
Based on 17 reviews
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Shannon
Phoenix, US
★★★★★ 5
Satisfied with purchase
Color: Green, Size: 3 Pack
Purchased for outdoor work purposes and they're absolutely worth the purchase. Very durable and waterproof. I actually repurchased for extras. The color is great as well as the size, overall satisfied.
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Reviewed in the United States on March 8, 2026
M
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Michael D Vicars
Pawtucket, US
★★★★★ 4
Pricey but nice.
Color: Orange, Size: 3 Pack
Nice pad, works as intended when wet and dry.
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Reviewed in the United States on January 29, 2026
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Verified Purchase
Peter D.
Massapequa, US
★★★★★ 5
"The" Standard for All-Weather Notebooks
Color: Black, Size: 3 Pack
This Rite In The Rain notebook is the leading brand for a reason. It works exactly as advertised, performing flawlessly in conditions where a normal notebook would be ruined. I’ve used alternative brands in the past and ran into issues with the paper or ink smudging, but I’ve had no such problems with this notebook. The weatherproof paper and sturdy cover ensure that your notes stay safe and legible, no matter the conditions.
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Reviewed in the United States on August 21, 2025
L
Verified Purchase
Laura Schluns
Carnegie, US
★★★★★ 5
An Amazing product, that works
Color: Green, Size: 1 Pack
I bought the (Rite in the Rain - Green Tactical Note Book (All Weather) for my line of work with the sheriffs department. And when your note taking can be the difference between your job and keeping someone bad off the streets, it's important to ensure that your notes are going not only to last, but handle all situations (like weather). I recieved my notebook about 5 days ago, and decided to give it a try, First I noticed it looked and almost felt like ordinary paper, but with a more thick quality with it. I began to write simple phrases on the first page with a variety of writing utensils, I tried an ordinary pen, a pencil, a 0.5mm pen and pencil, ballpoint pens, and so on. Then I tore out the first page which was as easy if not easier than an ordinary notebook. I took it over to the sink area and began to run water on the paper, for about 2 minutes the water beaded off the paper with ease, i turned the water off and examined the paper, it was only wet on the surface, i wiped the excess water off and perfect, it felt like the original paper with no signs of any water damage. This is a great product for someone who may work in an outdoor environment or just near water I highly Recommend this product to anyone in the market for a notebook that not only has quality but is resistant to everyday situations, thanks (Rite in the Rain) for making a great product. If you have any questions or comments or conserns please use the comment section below, and I will answer as swiftly as I can Thanks.
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Reviewed in the United States on April 17, 2012
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Fish
Boise, US
★★★★★ 5
Good quality
Color: Tan, Size: 6 Pack
These are very good quality. The only notepad that can stand up to extreme conditions. The 4X6 is the perfect size for back pockets.
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Reviewed in the United States on August 12, 2025

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