Drivetrain Compatibility Check for SF Hills: Tiagra 4700 shifters + GRX RX400 RD + SRAM PG-1050 Cassette?
Hey everyone,
I’m currently putting together a drivetrain upgrade for my Bianchi Volpe. I live at the very top of a hill in San Francisco, and my main purpose for this upgrade is to make life easier when climbing. A rider friend of mine recommended this specific setup to help me tackle the SF inclines without burning out.
I've bought the parts based on some initial research, but before I throw everything on the workstand, I wanted to do a quick sanity check to ensure I'm not missing any weird spacing or pull-ratio issues.
Here is what I am planning to pair together:
- Shifters: Shimano Tiagra 4700 (10-speed)
- Rear Derailleur: Shimano GRX RD-RX400 Rear Derailleur 2x10 Speed
- Cassette: SRAM PG-1050 (10-speed, 11-36t)
From what I gather, it should work because:
- The Shifter/RD pull ratio matches
- The Cassette spacing matches
A couple of quick questions for the SF riders and gear heads:
- Has anyone run this exact setup? Are there any weird shifting hiccups I should look out for, or does it shift crisp across the whole block?
- For the front derailleur setup, can I stick with my stock Tiagra
Appreciate any advice or confirmation before I get grease on my hands! Thanks!