So there is lots of talk about running a longer track on a 155" sled. This has been done for years by hill climbers, but Chris and Doo are making it more mainstream now. If your wondering what will fit on your sled here is a clip of an e-mail conversation with me and Tony from TracksUSA. I would recommend calling or e-mailing him if you have any questions. Great guy to work with!
Feb 24 at 11:10 AM
Good Morning Robert,
In regards to our conversation about guys turning their 155” / 156” RMK’s into either 162” / 163”, here are some track options we can provide:
If fellows are running a 2.86” pitch track, this would be both chaincase and belt drive models but the snowmobile would have come with a 2.4” or 2.6” lug only, they would have the following choices:
1) 9105M Challenger Extreme 163 x 15 x 2.5 -
https://www.tracksusa.com/Challenge...4&browse=-47154&shopBy=-13144&catalogId=-3693
2) 9231M Peak 163 x 15 x 2.5 -
https://www.tracksusa.com/Peak-25-d...3&browse=-47154&shopBy=-13144&catalogId=-3693
Both of these tracks will be center ported which is made to interface with stock center extrovert sprocket (direct replacement, no modifications necessary).
If guys are running a 3.0” pitch track, chaincase models only that came with Series 7, 3” lug, they would have the following options:
1) 9220M Challenger X3 162 x 15 x 3 -
https://www.tracksusa.com/Challenge...5&browse=-47154&shopBy=-13144&catalogId=-3693
This track is a solid center belt and does not accept the stock center port drive sprocket, it would require a drive sprocket change to Avid drivers ($260) and an anti-stab kit ($105) being it requires trimming rail tips.
2) 9220MSE Challenger X3 162 x 15 x 3 -
https://www.tracksusa.com/Challenge...5&browse=-47154&shopBy=-13144&catalogId=-3693
This track is center ported and will accept stock center drive sprocket. It would be a direct replacement, no drive sprocket change or anti-stab kit required.
3) 9335M Conquer 162 x 15 x 2.8 -
https://www.tracksusa.com/Conquer-2...0&browse=-47154&shopBy=-13144&catalogId=-3693
This track is also center ported and will accept the stock center drive sprocket allowing it also to be a direct replacement.
4) 9319M Challenger X3.2 162 x 15 x 3.2 -
https://www.tracksusa.com/Challenge...4&browse=-47154&shopBy=-13144&catalogId=-3693
Also being center ported, this track option would be a direct replacement.
If individuals are wanting to go from 155” to 163”, we would have a rail extension for their application. As we found with your snowmobile though Robert, with the way our rail extensions are designed to interlock into the existing rail, we cannot extend from either 155” / 156” to 162”. If they were going to go that route, it would require the Ice Age rails. Guys can certainly take a 155” 2.86” pitch snowmobile, install 3.0” pitch drivers and install the 162” track.
If guys are running a stock 800 or 850, the original Polaris center drive sprockets will certainly work, they do have to run the tracks tight though to prevent ratcheting as they are already aware. If customers are running higher hp motors with 3.0” pitch tracks, we suggest they install extrovert sprockets to help prevent track / sprocket slippage. The reason being 3.0” pitch tracks will be running seven tooth drivers vs. 2.86” pitch tracks running eight tooth drivers. The smaller seven tooth 3.0” pitch driver has less track contact and requires the track to wrap around a smaller circumference which isn’t as efficient.
Hope you’re having a good weekend.
Tony Vruwink
10340 67th Ave SE
Lake Lillian, MN 56253
320-382-6128
www.TracksUSA.com
www.DirtTracksUSA.com
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