I'd stretch to 105 over Tiagra if you can as the 105 pads are the replaceable cartridge type, so you can swap them for Swissstops / Koolstops / etc.
@Regal started
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I'd stretch to 105 over Tiagra if you can as the 105 pads are the replaceable cartridge type, so you can swap them for Swissstops / Koolstops / etc.