Hello everyone. I have a question. Recently acquired a Trek 800 from a local flea market for cheap ($20). The bike had a couple of problems like missing rear brake and some minor scuffs. But as I start to tune the bike up I realize that the bike is originally has an SRAM 24 speed grip shifter system. Problem that I am having is that the previous owner placed a 6 speed wheel on the back that I believe doesn't belong there. Of course left side shifter has 3 speeds, and right side has 8 speeds. So I went out to the flea market and picked up a 7 speed 26X1.5 mtb wheel. Its working out great, but I feel bad that I cannot properly shift the bike through all the gears.
Now my question is, is there a possibility I can buy an 8speed cassette for example at PERF BIkes and place it on the 7 speed hub with no problems, or do you guys think I will run into complications? Will there be a spacing issue? Do i have to buy a wheel with an 8 speed cassette already on (not easy to find)? Any input will be greatly appreciated. I just got into bike mechanics as a new hobby, and this is my first real bike that I have worked on. So far the bike is throrougly lubed, and rides great. TIA