42-584 Bicycle Tires (650x42B)

ETRTO is the only tire size standard that describes a real, measurable dimension, which is why it is the one worth trusting. Read 42-584 as “42 mm wide, on a 584 mm rim”. If the second number matches your rim, the tire fits.

Sidewall markings for this size are not consistent between brands. The same 42-584 tire is also printed as 650Bx42mm — all of these describe the same rim fit.

All 2 tires in 42-584

4 listings across 2 models, sorted by brand and weight. Where one model appears more than once, those are genuinely different products — a different casing, colour or claimed weight.

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Close alternatives for a 584 mm rim

These tires have a different width but the same 584 mm bead seat diameter, so they mount on the same wheel. Widths within ±3 mm of 42 mm are shown. Check your frame and fork clearance before going wider.

Brands making 42-584 tires

Maxxis, WTB.

Other sizes for 650B / 27.5-inch wheels

Every size below fits the same 584 mm rim.

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