Hi All, silly question for you. I’m looking at moving from 12-25 to 11-25 for some extra speed during sprinting in zwift. Will I need a new chain?
No, but also make sure your trainer diffculty is set to 100% if you are running out of gearing on small end.
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As long as your sticking with the same number of gears on your cassette, the chain should be fine.
The chain length should be ok too but sometimes might be a little slack in the 11 gear requiring removing a link.
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That’ll add some resistance “headroom” if you’re sprinting uphill – but otherwise, what would it do?
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It shifts resistance so you’ll use more of your smaller gears. At 0% you can use more of the larger gears as you’ll “feel” the hills less.
If the terrain is flat, isn’t 100% trainer difficulty the same as 0% trainer difficulty? If the terrain is downhill, isn’t 100% trainer difficulty easier than 0% trainer difficulty?
Yes, I think so. 100% will represent both uphills and downhills more like they actually are. 0% will basically flatten the hills. You still need the same power but your gearing is different. For example I usually leave my trainer difficulty set at 30% and I can do almost everything in my big ring. If I had my trainer set to 100% I’d need to use my small ring.