Help with better gearing.

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Rio_10
Posts: 10
Joined: Mon Jul 16, 2018 11:21 am

Help with better gearing.

Postby Rio_10 » Tue Jul 17, 2018 09:18 am

Hi all,

I am new to cycling and need some much need advice. I currently have use 10 speed Ultegra 6700, I have checked the rear derailleur and it just has RD-6700 stamped on it. I currently have a 12-25 cassette and I am struggling on some climbs. What would be the best way to put a 11-32 or 11-34 cassette on my bike. I am reading so much conflicting information and some state to use MTB RD…its all too confusing for me.

Any help would be appreciated

wongataa
Posts: 764
Joined: Wed Aug 22, 2012 10:28 am

Re: Help with better gearing.

Postby wongataa » Tue Jul 17, 2018 11:30 am

What size chainrings do you have up front?

Rio_10
Posts: 10
Joined: Mon Jul 16, 2018 11:21 am

Re: Help with better gearing.

Postby Rio_10 » Tue Jul 17, 2018 11:32 am

50x34

Rio_10
Posts: 10
Joined: Mon Jul 16, 2018 11:21 am

Re: Help with better gearing.

Postby Rio_10 » Tue Jul 17, 2018 11:33 am

I think the RD-6700 can only support up to 28T

trek_dan
Posts: 1337
Joined: Thu Jul 19, 2012 16:32 pm

Re: Help with better gearing.

Postby trek_dan » Tue Jul 17, 2018 11:35 am

Change to an 11-28 cassette, 34-28 is a more than adequate low gear.

NitrousOxide
Posts: 3806
Joined: Thu Mar 01, 2007 16:52 pm

Re: Help with better gearing.

Postby NitrousOxide » Tue Jul 17, 2018 12:36 pm

trek_dan wrote:Change to an 11-28 cassette, 34-28 is a more than adequate low gear for me


FTFY

Because the gearing we require depends upon our fitness/power and the gradients we will face, at different points through a ride or tour. It is entirely personal! :wink:

I love my cat 3/4 hill climbing, I've discovered this year I produce more power and climb them quicker using bigger gears (including using the 50T chainring for gradients up to ~10% if it is only a short section) at ~75-80rpm cadence, but if I've just "smashed" a combo of cat hills and the bits inbetween then at some point my legs will die and they will be begging me to use my 34-32 gear to get up anything with a slight incline... At least for a short recovery time.
================
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DJ58
Posts: 2056
Joined: Wed Oct 23, 2013 19:03 pm

Re: Help with better gearing.

Postby DJ58 » Tue Jul 17, 2018 20:45 pm

If your RD is a 6700-A SS or GS it will accept a 12-30T CS-4600 or CS-6700 10sp cassette. The RD-6700-A can be identified by a 30T stamped into the pulley wheel cage, upper guide wheel outside face.

google RD-6700-A and select images to view artscyclery.com photo

Don't forget to adjust the B-tension screw to prevent the larger sprocket on the cassette from fouling the upper guide pulley wheel.

Rio_10
Posts: 10
Joined: Mon Jul 16, 2018 11:21 am

Re: Help with better gearing.

Postby Rio_10 » Wed Jul 18, 2018 06:46 am

Thanks for the info, I have had a look and it does not have 30T stamped on the RD, so its a 6700 max 28T. What options to I have to put a 30T or 32T cassette on the bike? do they even do a 32T 10 Speed cassette?

Milemuncher1
Posts: 1465
Joined: Sat Jan 16, 2016 15:51 pm

Re: Help with better gearing.

Postby Milemuncher1 » Wed Jul 18, 2018 07:47 am

Get an 11-34 cassette, keep the derailleur you have, and get one of these fitted in between the hanger and the mech.

https://www.sigmasports.com/item/Wolf-T ... lsrc=aw.ds

It moves the cage away from the cassette. You may want to get a 118 link chain too.

Image

Here’s what it looks like fitted.

Rio_10
Posts: 10
Joined: Mon Jul 16, 2018 11:21 am

Re: Help with better gearing.

Postby Rio_10 » Wed Jul 18, 2018 07:53 am

cool device, however the Q&A states

"Unfortunately, this product is only designed to work with medium cage derailleurs, as the spaces a short cage derailleur too low to be used with a 32 cassette.

Rio_10
Posts: 10
Joined: Mon Jul 16, 2018 11:21 am

Re: Help with better gearing.

Postby Rio_10 » Wed Jul 18, 2018 07:56 am

also I cant seem to find a 11-32 10 speed road cassette, will it be ok to put a MTB one on?

Milemuncher1
Posts: 1465
Joined: Sat Jan 16, 2016 15:51 pm

Re: Help with better gearing.

Postby Milemuncher1 » Wed Jul 18, 2018 08:04 am

Rio_10 wrote:cool device, however the Q&A states

"Unfortunately, this product is only designed to work with medium cage derailleurs, as the spaces a short cage derailleur too low to be used with a 32 cassette.



If you have a short cage derailleur that’s right, I thought we were dealing with a medium cage.

Milemuncher1
Posts: 1465
Joined: Sat Jan 16, 2016 15:51 pm

Re: Help with better gearing.

Postby Milemuncher1 » Wed Jul 18, 2018 08:04 am

Rio_10 wrote:also I cant seem to find a 11-32 10 speed road cassette, will it be ok to put a MTB one on?

If you’re happy with the ratio selection, yes.

Imposter
Posts: 10346
Joined: Fri Jan 25, 2013 17:17 pm

Re: Help with better gearing.

Postby Imposter » Wed Jul 18, 2018 08:06 am

Rio_10 wrote:also I cant seem to find a 11-32 10 speed road cassette, will it be ok to put a MTB one on?


It's the same thing.

Milemuncher1
Posts: 1465
Joined: Sat Jan 16, 2016 15:51 pm

Re: Help with better gearing.

Postby Milemuncher1 » Wed Jul 18, 2018 08:12 am

If you need more range from the B screw, you can put it in back to front.

Milemuncher1
Posts: 1465
Joined: Sat Jan 16, 2016 15:51 pm

Re: Help with better gearing.

Postby Milemuncher1 » Wed Jul 18, 2018 08:27 am

Imposter wrote:
Rio_10 wrote:also I cant seem to find a 11-32 10 speed road cassette, will it be ok to put a MTB one on?


It's the same thing.


Not quite “the same thing”. Both a road and a MTB cassette will go on the free hub the same, but the MTB cassette will often have a larger difference in the number of teeth on adjacent sprockets, compared to the sprockets on the road cassette.

HaydenM
Posts: 2559
Joined: Mon Feb 08, 2016 09:03 am

Re: Help with better gearing.

Postby HaydenM » Wed Jul 18, 2018 09:09 am

Milemuncher1 wrote:
Imposter wrote:
Rio_10 wrote:also I cant seem to find a 11-32 10 speed road cassette, will it be ok to put a MTB one on?


It's the same thing.


Not quite “the same thing”. Both a road and a MTB cassette will go on the free hub the same, but the MTB cassette will often have a larger difference in the number of teeth on adjacent sprockets, compared to the sprockets on the road cassette.


Is that true for mtb/road cassettes which are both 11-32? Presumably that make mtb 11-32 cassettes more/less linear than road as the overall range is obviously still the same. I had assumed that the often mentioned difference in gaps was to do with the fact that mtb cassettes have a larger low gear, whilst keeping a similar curve and therefore having larger gaps to get the overall range.

Imposter
Posts: 10346
Joined: Fri Jan 25, 2013 17:17 pm

Re: Help with better gearing.

Postby Imposter » Wed Jul 18, 2018 09:41 am

Milemuncher1 wrote:
Imposter wrote:
Rio_10 wrote:also I cant seem to find a 11-32 10 speed road cassette, will it be ok to put a MTB one on?


It's the same thing.


Not quite “the same thing”. Both a road and a MTB cassette will go on the free hub the same, but the MTB cassette will often have a larger difference in the number of teeth on adjacent sprockets, compared to the sprockets on the road cassette.


Shimano 10sp 11-32 cassettes all have the same ratios. There is no 'road' or 'mtb' 11-32 cassette, it's just an 11-32 cassette. Look it up.

Rio_10
Posts: 10
Joined: Mon Jul 16, 2018 11:21 am

Re: Help with better gearing.

Postby Rio_10 » Thu Jul 19, 2018 08:41 am

Thanks all, I am taking the bike to a shop to get a bike fit and check my options. Although I now feel comfortable in what I have to do to get the range I want.


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