Need some help with compatibility on project road bike

calbear81

Hey guys,

I'm building a road bike for my wife (surprise!) and trying to find a cost effective way to do so w/o going overboard on parts. She's not a hardcore biker so she doesn't care as much about weight but I couldn't resist a deal I got on a Women's small Orbea carbon/alu bike that had an older Ultegra 6500 triple crankset (30/39/52) and 6500 brakes.

Since she's a beginner, I was thinking of going with some newer Tiagra/105 level parts that are a bit heavier but durable. Here's what I was thinking of doing, but a bit concerned about the mix match of parts. I know the x700 series don't work because the index and pulls don't work with older brakes.

Proposed parts list

- Tiagra 4603 shifters (3x10 speed)
- 105 FD-5603 front triple clamp on
- 105 RD-5600 rear derailleur
- 105 CS-5600 cassette (12-25) - take off from other bike

I think this would work but wanted to get a gut check from the experts on whether or not i'm going to have a problem mixing these together. Will the 105 FD shift my ultegra correctly based on the ramps?

Thanks!

gozzy

Yes it'll all be fine.
There's mixed opinions about whether x700 and x600 brakes and levers should be mixed.

Matthewfalle

If your taking the cassette off the other bike then, dependant on wear, you may need the chain as well.

Not worth getting a KMC for a tenner from CRC and matching new Tiagra cassette for probably not much more.

EDIT: Tiagra 10 speed cassette is £14.99 at CRC. For the sake and hassle of matching worn chains and cassettes I'd do it.