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Donnelly adds 650b gravel tire range

Published March 5, 2018

BOULDER, Colo. (BRAIN) — Donnelly is rolling out a 650b range of its X'PLOR tire series.

Among the first Donnelly 650b tires available in the U.S. are the X'PLOR Strada USH in a 650b x 42 size in a 60 tpi casing with wire or folding bead and tubeless ready. The Strada USH combines a fast rolling center track and scaled up herringbone tread for traction in the turns. The 650b x 42 tubeless ready retails for $67.00 and is equivalent to a 700c x 23 in diameter. Also being released is the Strada USH 650b x 50.

Also ready to roll is the X'PLOR MSO 650b x 42 tubeless ready. In the pipeline and soon to follow is its big brother, the X'PLOR MSO 650b x 50 tubeless ready, a tire that is equivalent to a 700c x 32 tire in diameter. Both of these models retail for $67.00.
The X'PLOR MSO tread is a serious adventure tire that was designed for multiple conditions. 

"With the growth of the gravel category comes an increased need for additional sizes for both our OE customers and for the aftermarket," said Donn Kellogg. "We've developed this 650b range in reaction to the market's demand for more universal platforms. Several brands have created models where one can use a 700c wheel for faster, less aggressive road riding, where a 650b wheel and larger volume tire can be used for exploring off the beaten path."

Also in stock is a 650b x 33 MXP, a tread that was originally developed specifically for cyclocross. Donnelly said the tread "is ready and able to tackle loose dirt, sand and moderate mud, hard pack and pavement — just the conditions you might find cruising out of town to a spring adventure ride."

Retailers who purchase a pair of Donnelly tires from distributor ProNet Cycling will receive a free copy of Nick Legan's book, "Gravel Cycling." More information at

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