I think I'll be looking for a Viper reverse kit to install on my 01 SRX over the summer and wondered if the bottom gear on those are the same as the older silent chain ones being that there's only one size?I know you can bring your gear ratio back in line to what you want with the appropriate top gear but I just wondered if say the mountain sleds had a different bottom gear than the trail sleds?I'm running 21/38 now,that's what was in it when I bought it,and it seems to work good with it,not sure what kind of top end speed I have because I only got my speedo working last night.