I currently have an endurance road bike equipped with Shimano 105 hydraulic disc brake calipers. Since I am transforming it into a gravel bike, I would like to change the calipers to the Shimano GRX 810 ones. I don't want to change the brake levers nor hoses though. Would it work? What do I have to consider when doing it?
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6Why do you want change the calipers? Are you changing disc sizes?– airace3Commented Jun 22, 2023 at 12:13
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@airace3 sounds stupid, but just to have all components from the same groupset :)– BobCommented Jun 22, 2023 at 12:46
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2If you’re not changing your levers, the components won’t all be from same group set.– Paul HCommented Jun 22, 2023 at 18:08
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@Bob what's the point?– njzk2Commented Jun 22, 2023 at 21:27
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Now I understand it is pointless :D– BobCommented Jul 6, 2023 at 13:54
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2 Answers
On https://productinfo.shimano.com/#/com?cid=C-737&acid=C-499 I found this chart:
Here you can spot a GRX caliper BR-RX810 on the right and a 105-brifter ST-R7020 (you didn't state which exact one you own) on the left. So if that is your preferred combination, you should be good to go. I don't know if it will be any better than your existing system of 105 brifter+caliper.
answered Jun 22, 2023 at 12:34
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Probably not, but I wanted it all to be from the same group set– BobCommented Jun 22, 2023 at 12:47
You don't have to change calipers. All Shimano Road/Gravel Calipers, except Dura Ace, are basically identical:
They may differ in design/color and the brakepads that come with them when new.
If you still want to replace them:
- Get new olives and pins.
- Remove the hose from old caliper, cut it just above the old olive to remove olive and the pin.
- Put new olive and pin on the hose and mount it to the new caliper.
- Bleed the brakes.
But there wont be any difference, except the different text and color on the calipers.
