Cassette Help

[IndianRoadie]

wonder if any one could help me as i am new to this

 

i have a Raliegh RC7000 the group set is campagnolo, but i noticed that i have 10 speed shifters but a nine speed cassette. so i wanted to buy a new cassette. i had a this in mind

 

http://www.evanscycles.com/products/campagnolo/veloce-10spd-cassette-ec017472#delivery

 

its a campy veloce 10 speed and the following options are available.

 

120231-1223-NA

12-23 tooth

http://www.evanscycles.com/images/layout/icon_info.gif?1354082524

 

 

In Stock – The item is in stock at our warehouse. UK next day delivery available if ordered before 1pm In stock

 

 

for next day delivery R 424.98

R 519.50 120231-1326-NA

13-26 tooth

http://www.evanscycles.com/images/layout/icon_info.gif?1354082524

 

 

In Stock – The item is in stock at our warehouse. UK next day delivery available if ordered before 1pm In stock

 

 

for next day delivery R 424.98

R 519.50 120231-1225-NA

12-25 tooth

http://www.evanscycles.com/images/layout/icon_info.gif?1354082524

 

 

In Stock – The item is in stock at our warehouse. UK next day delivery available if ordered before 1pm In stock

 

 

for next day delivery R 424.98

R 519.50 120231-1329-NA

13-29 tooth

http://www.evanscycles.com/images/layout/icon_info.gif?1354082524

 

 

Currently Unavailable – Currently there is no available stock for this product. Currently unavailable

http://www.evanscycles.com/images/layout/email_me_icon.gif?1354082524 120231-1125-NA

11-25 tooth

http://www.evanscycles.com/images/layout/icon_info.gif?1354082524

 

 

Currently Unavailable – Currently there is no available stock for this product. Currently unavailable

http://www.evanscycles.com/images/layout/email_me_icon.gif?1354082524

 

 

thing is i have a chorus derailure. i read that it would still work without hassles but i honestly do not understand the ratio parts. i know "26" would be the better climbing gear but the "11/12/13" i am not sure about.

 

anybody has some advice for me ? on whether it would work firstly and which tooth option is best ?

[Ryinc]

Ok the small number (e.g. 11,12,13) refers to the number of teeth on the smallest sprocket of the cassette. The lower the number the more "top-end" speed you will be able to generate (i.e. in the gear combination you find yourself in going down hills). Count the number of teeth on your current cassette - do you find that you sometimes want more speed in such a situation, i.e. you wish there was a "harder" gear to push ? If yes, you might want to consider getting a cassette with a lower number than your current cassette. If current cassette is just right in this regard then get a cassette with the same number, if you never get into the hardest gear, you might consider being willing to get a cassette with a slighter higher number of teeth on the small sprocket (e.g. 12 instead of 11) - i.e. giving up top-end speed that you never use anyway.

 

Now the second number (e.g. the 23, 25 etc) refers to the number of teeth on the largest sprocket. The higher the number the "easier" the gear. E.g. a 25 will have a slightly easier climbing gear to a 23. Again look at your current cassette set-up and ask, relative to what i currently have do i want another gear, or the same max climbing gear or can I give up a climbing gear?

 

Ok so now you may be asking - well surely choosing a cassette with the lowest number of teeth on the small sprocket, and the largest number on the large sprocket will be the best as it will give me the widest gear range? Correct, BUT remember that there will also be a bigger "gap" in the gears if the overall range is wider. However given that you are going from 9 speed to 10 speed that may not even be really noticeable for you because the 10 speed will "narrow" the gaps between gear combinations anyway.

 

Some final considerations:

- Be careful to go for a cassette which is very different from current setup. In particular taking a 28 or 29 on the high side you might find your deraileur is not compatible or chain is not long enough.

- Make sure your entire drive train (i.e. derailleurs, shifters, cranks, chain etc) are 10 speed compatible - i know you said you read they are, but double check if you want to be sure.

- If you are replacing cassette, it is usually worthwhile to replace the chain when you replace the cassette at the same time as a worn chain on a new cassette will wear out the cassette very quickly (i.e. waste money).

- If it was me, i would go for the 11-25, or if that was out of stock the 12-25.

[hanoj]

What he said

[Mr SingleTrack]

Ok the small number (e.g. 11,12,13) refers to the number of teeth on the smallest sprocket of the cassette. The lower the number the more "top-end" speed you will be able to generate (i.e. in the gear combination you find yourself in going down hills). Count the number of teeth on your current cassette - do you find that you sometimes want more speed in such a situation, i.e. you wish there was a "harder" gear to push ? If yes, you might want to consider getting a cassette with a lower number than your current cassette. If current cassette is just right in this regard then get a cassette with the same number, if you never get into the hardest gear, you might consider being willing to get a cassette with a slighter higher number of teeth on the small sprocket (e.g. 12 instead of 11) - i.e. giving up top-end speed that you never use anyway.

 

Now the second number (e.g. the 23, 25 etc) refers to the number of teeth on the largest sprocket. The higher the number the "easier" the gear. E.g. a 25 will have a slightly easier climbing gear to a 23. Again look at your current cassette set-up and ask, relative to what i currently have do i want another gear, or the same max climbing gear or can I give up a climbing gear?

 

Ok so now you may be asking - well surely choosing a cassette with the lowest number of teeth on the small sprocket, and the largest number on the large sprocket will be the best as it will give me the widest gear range? Correct, BUT remember that there will also be a bigger "gap" in the gears if the overall range is wider. However given that you are going from 9 speed to 10 speed that may not even be really noticeable for you because the 10 speed will "narrow" the gaps between gear combinations anyway.

 

Some final considerations:

- Be careful to go for a cassette which is very different from current setup. In particular taking a 28 or 29 on the high side you might find your deraileur is not compatible or chain is not long enough.

- Make sure your entire drive train (i.e. derailleurs, shifters, cranks, chain etc) are 10 speed compatible - i know you said you read they are, but double check if you want to be sure.

- If you are replacing cassette, it is usually worthwhile to replace the chain when you replace the cassette at the same time as a worn chain on a new cassette will wear out the cassette very quickly (i.e. waste money).

- If it was me, i would go for the 11-25, or if that was out of stock the 12-25.

nice post man, thumbs up!

[tombeej]

How large is your big ring (front)? If you end up with a 13T on the rear you'll most likely have to get a larger big ring to compensate. In other words, some hidden costs with buying an undergeared cassette (speaking from personal experience).

[Eugene]

how did you end up with a 9 sp cassette with a10 speed shifters? Does it work?

[BMXER]

how did you end up with a 9 sp cassette with a10 speed shifters? Does it work?

 

No reason why a 10 shifter won't work on a 9 speed cassetts.

 

 

 

Come now

[IndianRoadie]

@ Ryinc thanks man that was very helpfull I could never get that answer from google. Lol my top end is maybe limited coming down suikerbossie the beast speed I achieved was 69km/h maybe I need a smaller gear ?

 

@ Eugene i bought the bike with that setup and it works but there is play in the cassette almost like I need to shift twice to get from the smallest gear to the second smallest gear

[Tankman]

No reason why a 10 shifter won't work on a 9 speed cassetts.

 

 

 

Come now

 

You dont have any shifters on your BMX do you?

 

Yes the 10 speed shifters will work no matter what cassette you have on at the back but your shifting wont be smooth and your chain will be jumping around looking for the missing gear if you dont have the same speed cassette than shifters.

 

Shift increments differ between 7/8/9/10/11 speed shifters

 

Come now

[wendfan]

What cassette is currently on, shimano or campy? You can't use a campy cassette on shimano free body.