The original LS2 runner, made from elite stainless steel, comes with a standard 9 foot radius and improved hardware for the most secure attachment possible.
Bauer TUUK Senior Holder & Runner Sizing
You can find your holder/runner size printed on the underside of your TUUK holder near the heel of the boot. See image below:

Please note: Lightspeed II Runners will ONLY work with Lightspeed II Holders.
Bauer TUUK Senior Holder/Runner Sizing Chart |
Bauer Skate Size |
Runner Size (mm) |
D Width Skate |
EE Width Skate |
1.0 |
212mm |
212mm |
1.5 |
212mm |
212mm |
2.0 |
221mm |
221mm |
2.5 |
221mm |
221mm |
3.0 |
230mm |
230mm |
3.5 |
230mm |
230mm |
4.0 |
238mm |
238mm |
4.5 |
238mm |
238mm |
5.0 |
246mm |
246mm |
5.5 |
246mm |
254mm |
6.0 |
254mm |
254mm |
6.5 |
254mm |
263mm |
7.0 |
263mm |
263mm |
7.5 |
263mm |
272mm |
8.0 |
272mm |
272mm |
8.5 |
272mm |
280mm |
9.0 |
280mm |
280mm |
9.5 |
280mm |
288mm |
10.0 |
288mm |
288mm |
10.5 |
288mm |
296mm |
11.0 |
296mm |
296mm |
11.5 |
296mm |
306mm |
12.0 |
306mm |
306mm |
13.0 |
306mm |
306mm |
14.0 |
322mm |
322mm |
15.0 |
322mm |
322mm |