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27 inch (ISO 630 mm) Bicycle Tires from Harris Cyclery

This is the size used on most older 10- and 12-speed road bikes made for the U.S. or British market including:

Dawes; Jeunet; Mercier 100; Peugeot UO-8,UE-8; Raleigh Grand Prix, Record, Super Course; Schwinn Varsity, Continental, Super Sport; Univega; Vista and many others.

27" Tire/Rim CompatibilityOther Tire SizesGeneral Article on TiresTire Sizing Systems Explained

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I.S.O.
Size
Traditional
Size
BrandModelPriceFeatureDescription
32-63027 x 1 1/4"ContinentalGatorskinbuy button
Puncture Resist
Belt
DESCRIPTIONLight, (330g) fast semi-slick. These are really nice! Germany
32-63027 x 1 1/4"ContinentalSuperSport Plusbuy button DESCRIPTIONFast rolling, semi-slick tire with excellent puncture resistance. Very affordable.
32-63027 x 1 1/4"ContinentalUltra Sportbuy button DESCRIPTIONSemi-slick road tread 380 grams
32-63027 x 1 1/4"PanaracerPaselabuy button DESCRIPTIONJapanese quality, high performance tire.
(different size shown)
32-63027 x 1 1/4"PanaracerPasela PTbuy button
Puncture Resist
Belt
DESCRIPTIONJapanese quality, high performance tire. Belted for puncture resistance
(different size shown)
32-63027 x 1 1/4"TRB33 SchwalbeMarathonbuy button
Puncture Resist
Belt
DESCRIPTION Touring/rough stuff/city tire. Features reflective sidewalls for visibility, Greenguard® belt for puncture resistance...
28-32-63027 x 1 1/8" - 1 1/4"Inner Tubes
Schrader or Presta Valve
buy button This 28 mm - 32 mm tube size fits 622 mm rims with 700c x 28 mm - 32 mm tires as well as 630 mm rims with 27" x 1-1/8" - 1 1/4" tires.

Since tubes are stretchy, they do not need to exactly match the size of the tire. Depending on stock, size shipped may not be exactly the same as listed.

28-63027 x 1 1/8"ContinentalUltra Sportbuy button DESCRIPTION Semi-slick road tread 370 grams
28-63027 x 1 1/8"PanaracerPasela PTbuy button
Puncture Resist
Belt
DESCRIPTIONJapanese quality, high performance tire. Kevlar belt
(Measured width* 25.5 mm)
28-63027 x 1 1/8"PanaracerPaselabuy button DESCRIPTIONJapanese quality, high performance tire Japanese quality, high performance tire.
(Measured width* 25.5 mm)
25-63027 x 1"PanaracerPaselabuy buttonDESCRIPTIONJapanese quality, high performance tire.
25-63027 x 1"PanaracerPasela PTbuy button
Puncture Resist
Belt
DESCRIPTIONJapanese quality, high performance tire. Belted for puncture resistance
(different size shown)
22-25-63027 x 1"Inner Tubes
Schrader or Presta Valve
buy button This 23 mm - 25 mm tube size fits 622 mm rims with 700c x 23 mm - 25 mm tires as well as 630 mm rims with 27" x 7/8" - 1 1/8" tires.

Since tubes are stretchy, they do not need to exactly match the size of the tire. Depending on stock, size shipped may not be exactly the same as listed.

Note on tire/rim compatibility:

Traditional 630 mm (27 inch) rims were straight side design, but in the late '70s they evolved to a "hook edge" design which would permit the use of higher pressures.

These days, many 630 mm (27 inch) tires are marked "For hook edge rims only" (some companies use the term "crochet type" instead of "hook edge"...this is the result of poor translation.)

The fact is that modern 630 mm (27 inch) tires will work on older straight-side rims, but they won't handle as much pressure as they are capable of with hook edge rims.

Generally, the "rule of thumb" for traditional 630 mm (27 inch) tires is that they should be inflated to 70-75 psi. This shouldn't be a problem with any tire, despite whatever disclaimer the manufacturer puts on the sidewall. However, if you're restricted to this pressure range, you probably shouldn't be running tires narrower than 1 1/8, or preferably 1 1/4, unless you're a very lightweight rider.

Click here for 630 mm/27 inch rims!

Click here for 630 mm/27 inch wheels!

Need tire levers? Click Here!

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