Hi All,
just a quick question. I have a 2012 Specialized Secteur Apex Comp (10 speed). The cassette is a 11/32t. The wheelset is Vuelta Corsa Lite. I changed out the DT Swiss 2.0 that came stock (a bit heavy). But kept them hoping to use them for winter/early spring riding. As of now, those rims just have the tubes/tires, NO cassette. I have a Shimano 9 speed 11/32t cassette from a Klein MTB bike (its still new condition). Is it possible to place that cassette on the DT Swiss rims and use those DT Swiss rims on my bike? Seems like only difference is current cassette is 10 speed, the one I have in storage is 9 speed. Thanks in advance!

The gap between the cogs on the cassettes is different, so they won't both shift properly. It's the same reason you couldn't use 8-speed and 9-speed interchangeably a decade ago. It's really pretty simple -- when you fit more gears into the same space, they HAVE to be closer together, and when a shifter indexes for a certain amount of PULL on the cable, it'll pull THAT instead of what a mismatched cassette needs.

If you want to use the other wheelset, buy another 10-speed cassette.

Just sell the 9spd one and get a 10 spd cassette to use on a 10spd bike. Doing that will save you from a ton of problems and the need to change the RD, shifters and the like.

Cheaper too in the long run. Here is one under $40 delivered, but there are several under $50;

https://www.amazon.com/Shimano-CS4600...imano+cassette

/K

Thanks for the information! I appreciate the link. Will just buy a 10 speed cassette.

You can use the 9-speed cassette with the 10 speed shifter. The only thing you need to do is modify the cable using the alternate cable routing as shown on https://sheldonbrown.com/derailer-adjustment.html It will shift perfectly fine. Now if want to switch between the 2 set of wheels you'll have to switch the cable routing then adjust the RD accordingly.

thanks, that is the issue. too much to do. was hoping to just change out wheels and ride. oh well.

just another question. as of now, the cassette is an sram 11/32t. is it ok to add a cassette like 12/28t for example. as long as its ten speed, does it matter the number of teeth? I know it will be different as far as gearing and what not, but that's no big deal. just want to get a cheap cassette to use sparingly.

A 12-28 will be no problem. You might even like it better than the 11-32.

Im new to road biking and what I seem to understand is the 11/32 is good for climbing. I live in North East PA and we do have hills. do you think the 12/28 will also be good for hills? again, its not a big deal if it doesn't work as well, but more important wanted to use the other wheelset when weather is not so good and the roads still have all that dirt/rock. plus this will save my conti 4000s tires a bit.

bump

It all depends on whether you use the very lowest gear available -- 34/32 in your case. I think the next lowest would be the 28T cog, so if you never use the lowest gear on your current setup, you could switch to the 12-28 and enjoy slightly closer spacing.

I've got the same bike with the 11-32. To answer your question, will the 12-28 be good for hills , for most folks the answer is yes, depending on your fitness and the hills. Lot's of riders do great on hills with much higher rear cassette gearing such as 11/12-25 and compact fronts with a 34 small ring. My riding buddy is far stronger than me and he powers ahead of me on long steep hills in 30front-23rear(has a 30t granny on a triple) while I'm inching along in 26front-25rear(also a triple granny, a different bike than the Sectuer). I've only been riding for a bit less than a year and he for more than 30 years. He's a lot heavier than me as well, by at least 35 lbs (I'm 142)

IF you are going to only swap wheels seasonally, you might want to just buy the tools to swap the cassette back & forth.
Lock ring tool (Park FR-5?)
Chain whip
1" wrench

Although it's pretty much flat where I live, my "summer" & "winter" gearing is different.
Winter, I tend to be bundled up, cold and my conditioning falls off. I swap to lower gearing.
Summer is the opposite, so I go higher.
12-23 & 13/14-25.
Since I service the hub seasonally, I remove the cassette anyway.