SRAM AXS & Quarq Short Crankarms

£460.00
Spindle Length: Narrow
Crankarm Insert Size: 145/160mm

PREORDER FOR DISPATCH THE WEEK COMMENCING THE 24th OF FEBRUARY.

SHORT VERSION 145-160mm. 

Bringing maximum aerodynamics to your SRAM AXS and Quarq spiders through a narrower Q factor, CFD optimised crankarm profile and adjustable length crankarms.

Available in both short and long versions, allowing adjustment in 2.5mm increments between 145-160mm and 160-175mm respectively.

As part of the package a DUB spindle is supplied (narrow or standard), as such you will be replacing your crankarms and spindle. Retaining only the spider/direct mount chainring.

 

The standard-length spindle when paired with our crankarms offers a 137mm Q factor while the narrow-length spindle offers a 129.5mm Q factor.

If required additional pedal insert sizes are available to purchase separately.

Spider and/or direct mount chainring is not included. 

Product Description

SRAM AXS and Quarq cranksets are market-leading cranksets with various powermeter, BCD and direct mount options to suit your needs. With a Q factor of 145mm; installing the Cratus crankarms will reduce the Q factor, depending on the spindle option selected; narrow to 129.5mm or standard to 137mm. A 15.5mm and 8mm reduction in Q factor respectively.

Manufactured from 7075-T6 aluminium, anodised black and subtly laser etched with WattShop branding.

These crankarms are only compatible with 8 bolt SRAM and Quarq interfaces. Due to the design of the crankarms, a spindle is required and is included in the price. Therefore keeping only the spider or direct mount chainring in place. The spindle is a DUB spindle, allowing you to continue using the same bottom bracket.

If you intend to purchase the narrow spindle please check you have sufficient clearance. There is a 7.5mm reduction in spindle length. You can check clearance by measuring your existing spacer/s + preload ring setup. You may also need to check chainstay clearance.

Additional pedal insert lengths can be purchased separately.

Technical Specifications

TEST DATA

The 15.5mm reduction in Q factor equates to a rider dependent saving of 0.0015 to 0.0030m^2. Assuming a standard air density of 1.225kg/m^3 this results in a saving of:
- At 50kph = 2.5-5w
- At 60kph = 4.5-9w
Whereas an 8mm reduction in Q factor equates to a rider dependent saving of 0.0008 to 0.0016m^2.
- At 50kph = 1.5-2.5w
- At 60kph = 2-4.5w

WEIGHT

- 160-175mm Arms = 506g
- DUB Spindle (narrow) = 73g
- DUB Spindle (standard) = 77g
- Pedal Inserts (inc plates) = 35g/pair

HARDWARE

- DS & NDS crankarms
- 1x spindle (narrow or standard)
- 2x retention bolts
- 1x pair of pedal inserts and plates

Customisation Options

Spindle spacers, wave washers and spindle-to-spider bolts are not included. We can provide the spindle spacers and wave washers upon request.
Fixed length options can be made to order. Please email info@shopforwatts.co.uk with your custom requirements.