How do I confirm my frame takes a rear seat-stay mount caliper?

Seat-stay mount frames have a single threaded boss on the bridge between the two seat stays above the tyre. If you see a bridge with one central boss, you need the RS variant. Direct mount has two separate bosses lower on the frame.

Is the BR-R7010-RS compatible with older 5800 levers?

Yes — cable pull ratio is compatible with 105 5800 and older Shimano road levers. Optimal performance is with ST-R7000 levers but cross-generation compatibility works.

Shimano

Shimano 105 Brake Caliper, BR-R7010-RS, Rear-Seat Stay Mount Type

Name: Shimano 105 Brake Caliper, BR-R7010-RS, Rear-Seat Stay Mount Type
Brand: Shimano
SKU: CMB_WOW_IBRR7010RS82L
Price: 5350.00 INR
Availability: InStock
Author: InstaSport Editorial

₹5350.00

Description

Specification Integrated braking performance Sleek low-profile caliper design Comfortable rough road riding with larger tire sizes Compatible with wider 28C tire siz Intuitive braking control Smooth and light operation Features Material: Aluminium Technology: SLR EV, Dual Pivot Version: for Resr Whe