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Loosen Shimano ST-R225 levers

I have a bike that I inherited that I enjoy riding, but the gear change thumb levers on the Shimano ST-R225 are very tight and make my thumbs sore on a long ride. I have tried to find online how to adjust them to loosen them a bit but can't seem to find the information. I was wondering if anyone here could give me a couple of pointers?
Thanks, Darryl

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darrylxxx | 9 years ago
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Great, thanks for the help.

The bike is about 3 years old but only ridden hard since last August. I'll try some lube spray first and check them out for any obvious problems - would rather leave changing cables until the weather warms up!

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therevokid | 9 years ago
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depends on how old the setup is ... If it's done a couple of winters then
I'd just replace all the cables (inners and outers).

cleaning generally involves partially removing the cables so you can run
a lubricant through them.

I'm fairly sure there's nothing you can do about the trigger itself, although
a silicon spray lube may make things a little sweeter  1 have took say that
the trigger shifter on my mtb has never made my thumb sore !

start by replacing the cables though if they're old.

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darrylxxx | 9 years ago
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Thanks @therevokid, makes sense. How would I clean the cables or adjust the cable tension in the trigger? Or is it time to replace the cables?

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therevokid | 9 years ago
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most likely being caused by dirt in the cables as you can't "adjust"
the trigger itself.

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