Size at a glance
| ETRTO / ISO | 25-630 |
|---|---|
| Metric / French | — |
| Imperial (calculated) | 27 x 0.98 |
| Tire width | 25 mm (0.98 in) |
| Rim bead seat diameter | 630 mm |
| Common wheel name | 27-inch |
ETRTO is the only tire size standard that describes a real, measurable dimension, which is why it is the one worth trusting. Read 25-630 as “25 mm wide, on a 630 mm rim”. If the second number matches your rim, the tire fits.
Sidewall markings for this size are not consistent between brands. The same 25-630 tire is also printed as 630x25 — all of these describe the same rim fit.
All 1 tire in 25-630
1 listing across 1 model, sorted by brand and weight. Where one model appears more than once, those are genuinely different products — a different casing, colour or claimed weight.
| Brand | Model | Type | Weight | Build | Link |
|---|---|---|---|---|---|
| Schwalbe | SV20 Extra Light | Road | — | — | Details |
Search another size in the tool
Close alternatives for a 630 mm rim
These tires have a different width but the same 630 mm bead seat diameter, so they mount on the same wheel. Widths within ±3 mm of 25 mm are shown. Check your frame and fork clearance before going wider.
| Brand | Model | Type | ETRTO | Weight | Build | Link |
|---|---|---|---|---|---|---|
| Schwalbe | SV20 Extra Light | Road | 22-630 | — | — | Details |
Brands making 25-630 tires
Schwalbe.
Other sizes for 27-inch wheels
Every size below fits the same 630 mm rim.