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| 70 mm | Bike Friday tikit, Birdy, Breezer Itzy, Brompton front hub. |
| 74 mm | Dahon Speed front hub. |
| 91 mm | Low-end front hubs. |
| 96 mm | Older front hubs, especially French. |
| 100 mm | Modern front hubs. |
| 110 mm | Rear older track, coaster brake and other single-speed hubs. Also, front hubs for Downhill bikes with 20 mm axles. |
| 114 mm | Rear 3-4-speed. This is US, U.K. 4 1/2 inches also. |
| 120 mm | Rear 5-speed, Ultra 6, newer track hubs. |
| 126 mm | Rear 6- and 7-speed (road). |
| 130 mm | Rear 7-speed (MTB) and 8- 9- and 10-speed (road). |
| 135 mm | Rear 7- 8- and 9-speed (MTB) |
| 140 mm | Rear tandem. |
| 145 mm | Rear tandem (newer models.) |
| 150 mm | Retro-Choppers, some Downhill and Freeride models. |
| 160 mm | Rear tandem (new Santana proposed standard.) |
| Brand and model | Center-to-center Spacing |
Sprocket Thickness | Spacer Thickness | Total Width |
|---|---|---|---|---|
| 5-speed | ||||
| "Regular" 5-speed |
5.3 mm | 1.85 mm | 3.5 mm | 23.2 mm |
| 6-speed | ||||
| "Regular" 6-speed |
5.3 mm | 1.85 mm | 3.5 mm | 28.3 mm |
| Sun Tour "Ultra" Freewheel 6-speed |
5.0 mm | 1.85 mm | 3.15 mm | 26.9 mm |
| Sun Tour Accushift XCD-6 6-speed |
5.5 mm | 2.0 mm | 3.5 mm | 29.5 mm |
| 7-speed | ||||
| Shimano HG 7-speed |
5.0 mm | 1.85 mm | 3.15 mm | 31.9 mm |
| Shimano IG 7-speed |
5.0 mm | 2.35 mm | 2.65 mm | 32.4 mm |
| Sachs 7-speed |
5.0 mm | 1.8 mm | 3.2 mm | 31.8 mm |
| SRAM Freewheel 7-speed |
5.0 mm | 1.8 mm | 3.2 mm | 32.8 mm |
| Sun Tour "Ultra" Freewheel 7-speed |
5.0 mm | 1.85 mm | 3.15 mm | 32.4 mm |
| Sun Tour MicroDrive 7-speed |
4.8/5.0 mm | 2.0 mm | 3 x 2.8 mm(L) 3 x 3.0 mm(H) |
31.5 mm |
| 8-speed | ||||
| Campagnolo 8-speed |
5.0 mm | 1.9 mm | 3.1 mm | 36.9 mm |
| Mavic 8-spd w/rounded dogs |
5.2 mm | 2.0 mm | 3.2 mm | 37.0 mm |
| Shimano 8-speed |
4.8 mm | 1.8 mm | 3.0 mm | 35.4 mm |
| Sachs 1997 8-speed |
5.0 mm | 1.8 mm | 3.2 mm | 36.8 mm |
| Sachs 1998+ 8-speed |
4.8 mm | 1.8 mm | 3.0 mm | 35.4 mm |
| SRAM Cassette 8-speed |
4.8 mm | 1.8 mm | 3.0 mm | 35.4 mm |
| SRAM Freewheel 8-speed |
5.0 mm | 1.8 mm | 3.2 mm | 36.8 mm |
| Sun Tour MicroDrive 8-speed |
4.8/5.0 mm | 2.0 mm | 3 x 2.8 mm(L) 4 x 3.0 mm(H) |
36.5 mm |
| 9-speed | ||||
| Campagnolo 9-speed |
4.55 mm | 1.75 mm | 2.8 mm | 38.2 mm |
| Shimano 9-speed |
4.34 mm | 1.78 mm | 2.56 mm | 36.5 mm |
| SRAM 9-speed |
4.34 mm | 1.8 mm | 2.54 mm | 36.5 mm |
| 10-speed style="text-align:center;" | ||||
| Campagnolo 10-speed |
4.12 mm | 1.7 mm | 2.42 mm | 38.8 mm |
| Shimano 10-speed |
3.95 mm | 1.6 mm | 2.35 mm | 37.2 mm (note) |
| 11-speed | ||||
| Campagnolo 11-speed |
3.85 mm | 1.6 mm | 2.25 mm | 40.1 mm (note) |
Note: the innermost sprocket of these cassettes is inboard of the flange of the freehub body to move the sprockets to the left and make more room between the outermost sprocket and the dropout. The rear derailer may interfere with the spokes, especially if the innermost sprocket is relatively small or the wheel has an unusual spoke pattern.
