Size at a glance
| ETRTO / ISO | 42-406 |
|---|---|
| Metric / French | — |
| Imperial (calculated) | 20 x 1.65 |
| Tire width | 42 mm (1.65 in) |
| Rim bead seat diameter | 406 mm |
| Common wheel name | 20-inch |
ETRTO is the only tire size standard that describes a real, measurable dimension, which is why it is the one worth trusting. Read 42-406 as “42 mm wide, on a 406 mm rim”. If the second number matches your rim, the tire fits.
All 2 tires in 42-406
2 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.
| Brand | Model | Type | Weight | Build | Link |
|---|---|---|---|---|---|
| Schwalbe | Marathon Plus Spike | Trekking/City | — | Black+Reflex · E-25 | Details |
| Schwalbe | SX-R | BMX/Dirt | 255 g | Black | Details |
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Close alternatives for a 406 mm rim
These tires have a different width but the same 406 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.
| Brand | Model | Type | ETRTO | Weight | Build | Link |
|---|---|---|---|---|---|---|
| Maxxis | DTH | BMX/Dirt | 44-406 | 374 g | Black | Details |
| Maxxis | DTH | BMX/Dirt | 44-406 | 432 g | Black | Details |
| Maxxis | Relix | BMX/Dirt | 44-406 | — | — | Details |
| Maxxis | Torch | BMX/Dirt | 44-406 | 367 g | Black | Details |
| Michelin | City J Access Line | Kids | 44-406 | 500 g | Black | Details |
| Michelin | City J Access Line | Kids | 44-406 | 510 g | White | Details |
| Michelin | Pilot SX Racing Line | BMX/Dirt | 44-406 | 400 g | Black · Tubeless | Details |
| Michelin | Pilot SX Slick Racing Line | BMX/Dirt | 44-406 | 420 g | Black · Tubeless | Details |
| Schwalbe | Billy Bonkers | BMX/Dirt | 40-406 | 285 g | Performance · Black+Reflex | Details |
| Schwalbe | Green Marathon | Trekking/City | 40-406 | 520 g | Black+Reflex · E-25 | Details |
| Schwalbe | Marathon 365 | Trekking/City | 40-406 | 550 g | Black+Reflex · E-50 | Details |
| Schwalbe | Marathon Racer | Trekking/City | 40-406 | 355 g | Black+Reflex · E-25 | Details |
| Vittoria | Lampo | BMX/Dirt | 45-406 | 280 g | Black | Details |
| Vittoria | Veloce | BMX/Dirt | 45-406 | 275 g | Black | Details |
Brands making 42-406 tires
Schwalbe.
Other sizes for 20-inch wheels
Every size below fits the same 406 mm rim.