IBIS CYCLES 742 148 Boost
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Shimano Phone or email to confirm availability
With the 742/942, we've retained the 41mm outer/35mm inner widths of our 741/941 rims, while increasing impact strength, reducing weight and maintaining all-important lateral stiffness.
Our new carbon rim design features a lower cross section height for increased impact performance. The lower 19.5mm section height makes the wheel better able to distribute the loads of localized impacts from rock strikes or hard landings.
Also, we are introducing a new hybrid carbon fiber layup, strategically combining layers of a new, high-toughness carbon/epoxy prepreg with our original carbon composite, increasing both ultimate strength and impact durability. This, combined with the asymmetric rim design that features 5mm of offset (2.5mm on 735/935) allows for higher spoke tensions that are nearly equal from one side of the wheel to the other. As a result of all this, the 742/942 nets a 30% increase in impact strength yet a 7.5% decrease in weight, compared to our previous rims.
Our carbon wheels now come with the excellent Industry Nine Torch hubs. The durable hubs are made in the USA in Industry Nine's Asheville machine shop, and feature a 60t ratchet with 6 out of phase pawls that results in a 3Âº engagement. They are equipped with Enduro bearings and come with either Shimano or SRAM XD drivers.
ADVANTAGES OF WIDE RIMS
A wider rim delivers better sidewall support so in many cases you can run lower pressures in your rubber. Tires mounted on wider rims don't burp as easily. Lower pressures, even a pound or two, do several beneficial things, including increasing the contact patch, which results in better traction. Running lower pressures on varied terrain actually reduces rolling resistance. Wider rims are stronger and stiffer. With increased traction comes increased braking control.
HITTING THE PLUS SWEET SPOT
The 742/942/738/938 rims are ideal for the ultra low pressures (10-18 psi) that we like to run with 2.8 Plus tires (or 18-25psi for 2.25" - 2.5" tires). Running any of our 35mm internal width rims work incredibly well with the new 2.8 Plus rubber we've been riding from Schwalbe and Maxxis. The low system weight of the wheels with these rims and tires combined with the monstrous traction advantage have been a revelation for those who have ridden them.
We've also had great luck with the 3.0 tires on the rims, and our tire manufacturing friends have informed us that there are a lot of new Plus tires in the pipeline.
41 mm outside, 35 mm inside width, 27.5" / 650b diameter, carbon fiber
Industry Nine hubs with 60t ratchet, 6 pawls out of phase. 3Âº engagement
1630g for the set
rim only 435g
32h Hubs | Shimano or SRAM XD driver
148 x 12 BOOST Rear | 110 x 15 BOOST Front
Tubeless Ready, Center Lock Brake Mount
Sapim CX-Ray Spokes, 5mm spoke offset for a symmetrical build
As with any product, specification is subject to change without prior notification. You are advised to confirm current specification before buying.