>>1928006>offroad ebikego with a trail tire from your preferred manufacturer. once you go tubeless you won't get flats.
>>1928038No experience with trainers, but it sounds like you pull the rear wheel on your bike, then attach the bike to said trainer+cassette.
I would just get a deore 11 speed groupset since you will need
11 speed derailluer, shifter, cassette, (maybe chain, chainring)
Could look used, just stick with shimano and everything should work.
>>1928069Don't know, but if you stick with big name brands you should be fine. Figure out the use case(bmx, bmx racing, urban tricking, etc) and get one suitable.
>>1928079>100% increase in costI can't say besides production bullshit.
Yeah, they are using cheaper steel for the normal rails.
No, the difference probably isn't that significant.
The seat fitting your bones and body is 1000000X more important.