Has anyone extended there 121 to a 128? This seems to be the current sweet spot of tracks. I also believe you would not have to extend the tunnel with this set up, rather than going to 136. I have found rail extension from tracks USA and plenty of 128" tracks. Just thinking. Al
smokingcrater
Member
128 isn't the most popular... 7 more inches of track will give you less than 3 inches extra on the ground, so its barely worth the expense. Most people just hop up to a 136 which gives you pretty much the best all around combination.
In general, the tunnel extension part is relatively painless in the whole scheme of things.
In general, the tunnel extension part is relatively painless in the whole scheme of things.
staggs65
Moderator
depends on what use I guess. the 128 x 13.5s are pretty hot for racing
We already have 136" in the Viper, not exactly the best trail riding, not bad but I do see a differance. I also really think you can extend the rails and run the 128 without extending the tunnel. Especially if you are running a long travel suspension. Expense is a wash if you are replacing a track anyway. We have already 697 miles this year on my SXR the Viper has 627, most are Deep snow at Twin Lakes MI UP. The 121's ran great but the 136 did float a little better. Al
super1c
Super Moderator
Al i was thinking the same thing, like a 128 mono skid and track out of a apex!