A disk-specific 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 and customisation through our choice of hubs and spoke nipples for the perfect fit with your bike.
The rim width is a massive 22mm internal, 30.5mm external optimised for best aerodynamic performance with tyres measuring around 25-27mm. The width allows for lower tyre pressures without increasing rolling resistance – we recommend 60-80psi for most riders.
The Mahi Mahi disk rim is the result of 3 years’ development with our rim supplier including several iterations of rim design to perfect the tubeless fit. With 15 years’ experience of building tubeless wheels it was important for us to use a rim which offers easy tubeless inflation and maximum tyre security as well as strength. The result is a semi-hooked sidewall design which fits tubed or tubeless tyres securely and easily and offers greater impact resistance than a standard hooked bead. Unlike hookless bead rims, the semi-hook bead is suitable for running tyre pressures up to 100psi with 25mm tubeless tyres (though we recommend lower pressure for better ride quality)
Long term reliability, strength and meticulous attention to detail is standard on every wheelset we build. At the heart of this is our JRA hubs, with variants to fit any bike but all sharing the same light weight, ultra smooth and durable TPI bearings and reliable 6-pawl double-sealed 48-point freehub design. Building all wheels by hand in-house means quality control is built-in to every wheel with each component being checked as the wheel is built so we can achieve very close to zero returns.
40mm and new 50mm rims due March 2022.
hubs : JRA centre-lock or 6-bolt hubs, Straight-pull or J-Bend
rim : JRA Mahi mahi carbon rims, 24 hole front 24 hole rear with black or white water transfer decals
spokes : Sapim CX-Ray black spokes
nipples : choose from brass or aluminium coloured nipples
weight 40mm: Centre-Lock Straight-Pull pair 1486g (front 680g / rear 806g)
freehub: Shimano, Campagnolo or Sram XD freehubs