Today’s question is about switching to a Mega Range cassette on a road bike…

Old lady who lives in hills near Scotland is thinking of buying Specialized Vita Comp. Is it possible to change gears to mega range (34)? Can’t get straight answer from shop.

Thanks,
Mrs. Watson

Hi Mrs. Watson,

Looking at the 2010 Vita Comp on the Specialized website, I see it has a Shimano HG-50, 9-speed, 12-25t cassette with a triple chainring crankset.

If you know that you need lower gearing, yes, it would be possible to change it by getting a new cassette. The easiest way would be to use a 9-speed 11-34t mountain bike cassette as a replacement.

Look for a “Shimano Deore HG-50 9-Speed 11-34 MegaRange Cassette.”

But that’s not the end of the story. Switching to a cassette with a larger cog might require a few changes to the rest of the drivetrain to get everything working properly.

This might include a new rear derailleur with a longer cage (like one for a mountain bike,) plus adding a few links to the chain. The good news is, those are easy changes for any bike shop to make.

It shouldn’t cost too much or take too long for the switch, either.

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