I'm renovating/upgrading my old Scott hybrid/commuter. I don't actually know how old the bike is, but I think it is more than 10 years old. It originally came with 3x8 Shimano Nexave FD/RD + trigger shifters, and still have those parts.
I want to exchange the rather worn parts with new and shiny stuff. Now for the complicated (and maybe stupid?) part: I want to convert the drivetrain to 2x10. And as I'm currently using a 48/38/28 crankset I want to have a similar big front gearing to keep the top speed, and am therefore looking at using a compact road crankset (50/34) + Shimano 105 front derailer. For the rear I want to use an SRAM X5 rear derailer and a wide-range cassette.
From what I've understood from Sheldon Brown's website, it is no problem with switching between 8/9/10 speed cassettes on Shimano hubs, but I might have missed something in the wealth of information there. If it doesn't work I can simply get a new rear wheel (or hub if I can find someone to rebuild the wheel), so it's not a very big deal.
The real problem comes with the shifters: I'm looking at using SRAM X5 trigger shifters (which of course work with the rear derailer). I've come to understand that SRAM and Shimano MTB front derailers and shifters are interchangeable, but I've not been able to find anything about combining Shimano road front derailers and SRAM MTB trigger shifters.
An alternative is using SRAM SL700 trigger shifters (which also should work with the X5 RD as they both use SRAMs "Exact Actuation"?), but I'm still not sure it will work with the Shimano 105 front derailer.
So to recap and summarize:
Can I put a 10-speed cassette on a 8-speed hub?
Is it possible to combine a Shimano 105 front derailer (road) with SRAM X5 trigger shifters (MTB)?
Combine Shimano 105 front derailer (road) and SRAM X5 rear derailer (MTB) with SRAM SL700 trigger shifters (road)?
(And lastly a disclaimer: I have tried to search as much as possible, but seeing as English isn't my first language and I'm not very well versed in all the specialised terms used in the bike world I might very well have missed much. So feel free to yell at me as I've probably missed something very basic.
I put the thread here rather than the hybrid forum as it is more of a general build question rather than specific for hybrids.
I have also never rebuilt a bike this way before, only changed chain a couple of times and replaced a brake wire or two, so tell me if I might be in over my head with this project.)