Mahi Mahi disk brake wheels – blue straight-pull hubs

£879.00 £615.30

The Mahi Mahi disk wheels offer a perfect balance of light weight and power-saving aerodynamic profile. Our in-house hand-built quality, high performance hubs and Sapim CX-Ray spokes add up to an unbeatable wheelset for racing or all-round riding, on or off-road.

build time for this wheelset: 5 days
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SKU: JRA_MM_8-2-1 Category: Tags: ,

Our light weight aero disk wheelset available in 40mm or 50mm rim depth. Now available at a reduced price to clear older rim decals and 48 point-of-engagement hubs.

A limited edition version of our most popular carbon road disk wheelset, our 40mm Mahi Mahi rim is now available in a semi-gloss finish with a new decal design in 2 colour options; grey and light blue.

The 40mm deep disk-specific rim design allows for optimised aerodynamics while the low weight is an important part of the lively, responsive feel and streamlined performance of these wheels in all weather conditions. As with all our wheels they are handbuilt by us in our York workshop for perfect build quality every time with a choice of hub colours and spoke nipples for the perfect fit with your bike. As standard we build these wheels onto our lightest, most popular hub choice, the centerlock disk straight-pull version. Please contact us if you would like these wheels built onto any of our other hubs.

40mm carbon rims

internal width: 22mm
external width: 29mm
depth: 40mm
bead hook: semi-hook
material: UD matt carbon weave
finish: semi-gloss black finish
decal: water transfer
The rim is optimised for best aerodynamic performance with tyres measuring around 25-28mm, while the 22mm width allows for lower tyre pressures without increasing rolling resistance – we recommend 60-80psi for most riders.

straight-pull hubs

bearings: stainless steel
finish: matt shot blasted
decal: laser etched with scribble design

Key components

hubs : JRA straight-pull hubs in blue matt finish, with laser etch
rim : JRA Mahi mahi 40 or 50mm carbon rims – 24 hole
spokes : Sapim CX-Ray straight-pull black spokes
nipples :  Your choice of Sapim aluminium or brass secure-lock nipples
weight: pair 1483 g (front 685g / rear 798g) – 40mm rims (+30g per wheel for 50mm rims)
freehub: Shimano 11 speed or Campagnolo 12 speed are included in base price. All other freehubs are available at extra cost.

rider weight limit: 90kg
recommended tyre widths: 25mm – 34mm

why buy from us


All wheels have a 3 year warranty on build quality and components, with a longer 5 year warranty for hub shells.
See our warranty page for more details and the small print.


To ensure reliable, prompt delivery our wheels are shipped via UPS to almost all locations in the UK and worldwide.
see our delivery page for more details.


All of our wheels are fully repairable. We stock a complete range of spares and can service, rebuild or repair any wheel sold by us.
order servicing here.

about us

We’ve been building wheels since 2005 and selling online in 2006. We developed our wheel building process and refined the components we offer for more than 17 years to offer reliable a wheels.
read our story here.

our hubs

Just Riding Along wheelsets are built around premium quality hubs from Bitex in Taiwan. We have used these hubs on all of our own-brand wheelsets since 2014 with proven reliability and durability.


All wheels include a 5 year warranty on hub shells, and 3 year on all other parts.

Bearing wear is not included.


6 pawls in 2 groups engage the drive ring inside the hub shell. The groups are offset slightly to double the points of engagement (POE) for a fast response to pedal input. M-type hubs have 6.7 degree, 54 POE, R-type hubs have 7.5 degree, 48 POE.


  • Durable
  • changeable axles
  • repairable
  • lightweight
  • TPI bearings
  • anti-bite guard
  • laser etched decals

about your wheels

custom built wheels

This wheelset is built to order. We hold most parts in stock and build them after you have ordered. The build time is advertised on the front page on under the title.

what’s included

  • Wheels are set-up with the axles and freehub you have selected.
  • All wheels have tubeless tape applied.
  • There are no additional parts provided.

build quality

During the building process all components are bedded in, stretched, and tensioned repeatedly so the wheels won’t go out of true. We inspect, check and finish every wheel with equal care.

handbuilt in the UK

We built the wheels in our York, UK workshop.

Additional information

rim material & finish


rim data
external rim width


internal rim width


wheel size

hole count


Just Riding Along


front lacing pattern

2 cross

rear lacing pattern

2 cross

riding type




1500 g

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