Finally Switched Cassette's
- Thread starter jowwy
- Start date
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potsy
Rambler
- Location
- My Armchair
You will see a 'slight' difference but nothing earth shattering I wouldn't have thought.
I have gone from a 12-25 to a 12-27 albeit on a triple and it is noticeable, certainly helps at the end of a long day
Peteaud
Veteran
- Location
- South Somerset
Same here, 12-25 to a 12-27.
Yes a difference, but still thinking about 12-30 hybrid cassette.
Yes a difference, but still thinking about 12-30 hybrid cassette.
edindave
Über Member
- Location
- Auld Reeker
Will that gain you much for the expense? Unless it's going to get you using the 11 on the rear more then maybe, but do you spend much time in the one up from it?
I run 50/34, 11-28, and I'm rarely using the 11 or 12 unless downhill with a tailwind!
I run 50/34, 11-28, and I'm rarely using the 11 or 12 unless downhill with a tailwind!
it is for the end of the ride i need it for - my 45 mile loop see's me climbing 1000ft continually over the last 8 miles, with one ferociuos climb in the middle which starts straight after a tight hairpin bend, which means you have no run up or speed going into the climb
the expense was £13........hardly worth me breaking sweat over to be honest
black'n'yellow
Guest
your climbing 'ability' will not be affected, because that relates specifically to your fitness. But your gearing will be slightly lower, if that's what you meant..? Overall it just means you will go slower uphill for the same effort.
climbing speed would relate to fitness
climbing ability relates to, have i got the right gears to give me the ability to climb that hill, while sitting and spinning, rather than grunting and grinding
edindave
Über Member
- Location
- Auld Reeker
the reason i was thinking of the 48, is because i think it would give me better cruising speeds at the middle of the rear cassette, without having to go up and down the cassette to much for small climbs and small descentsSorry I wasn't clear, I meant the 48.
Sure the 28 will be much better for the hills
cyberknight
As long as I breathe, I attack.
- Location
- Land of confusion
Changing the 50 for a 48 will not affect your climbing as surely you will be on the 34 ring for hills if you changed the cassette for a smaller gear ratio.AFAIK the tiagra + mechs will handle a 30 tooth max rear gear, any higher than that and you would be looking to change your rear mech to a MTB long cage assuming your running shimano groupset.I use sram that has the ability to go to 32 tooth on the back with the wifli mechs e.g. apex.
The only other options would be changing to a triple which means you need a new crank,chainrings ,bottombracket and LH shifter which is going to be expensive.
black'n'yellow
Guest
true - and if you don't have the ability on a 26 then you won't have it on a 28 either. Just accept that if you go uphill, you will need to work harder...which may include some 'grunting' and grinding' as you put it...
edindave
Über Member
- Location
- Auld Reeker
Easy way to find out the difference it will make to cruising speed is to plug the figures into the Sheldon Brown Gear Calculator. http://sheldonbrown.com/gears/
You can put the 48 and 50 side by side and see how they compare for a given cadence. And lots of other options... dunno your cassette but you can see the result here for an 11-34.