Chain Ring Advice Please

Nic,

rear cassettes are cheap and easy to change compared with front chainrings sets. Just find the bike you like, fit the right tyres and ride it! After a few weeks see which rear gears you don't use and buy a cassette that favours the most used range.

I am building a bike with 53/42/30 front and most of my riding is flat roads so my cassette choice will probably be 12-21. If I was in hillly country it would be 13-27 or general purpose 12-25.

beltabout said:

I [font=Arial] have posted about buying a new bike recently and found the help on the forum most useful so here’s a test for you all!

The bike I ride currently without any problems has 48, 38, 28 chain rings on it’s crank set, which powers a standard 11/28 cassette, which is 11, 13, 15, 18, 21, 24 & 28.

The bikes I am looking at have 44a, 325, 225 chain rings that in turn powers a 11/34 cassette 11, 13, 15, 17, 20, 23, 26, 30, 36.

This means I will not be able to go as fast according to Sheldon Browns site [/font][font=Arial]sheldonbrown.comgearsOpen ↗[/font][font=Arial] at 60 RPM currently I manage 30.7 kph
As apposed to 28.6 kph. I will be able to peddle better in the lower gears and climb steeper hills.
Are there other considerations I should be aware of before I change the chain set to one that I am comfortable with.

As always any help advice is greatly appreciated.

Good riding

Nick[/font]

You ought to be able to figure out the answer.Obviously, if you want to go real fast, that 44 big ring doesn't wash. Do you really need a wall climbing 22x34 granny.You have a comparable with what you are riding, and know what you need or want, we don't.

beltabout said:

I [font=Arial] have posted about buying a new bike recently and found the help on the forum most useful so here’s a test for you all!

The bike I ride currently without any problems has 48, 38, 28 chain rings on it’s crank set, which powers a standard 11/28 cassette, which is 11, 13, 15, 18, 21, 24 & 28.

The bikes I am looking at have 44a, 325, 225 chain rings that in turn powers a 11/34 cassette 11, 13, 15, 17, 20, 23, 26, 30, 36.

This means I will not be able to go as fast according to Sheldon Browns site [/font][font=Arial]sheldonbrown.comgearsOpen ↗[/font][font=Arial] at 60 RPM currently I manage 30.7 kph
As apposed to 28.6 kph. I will be able to peddle better in the lower gears and climb steeper hills.
Are there other considerations I should be aware of before I change the chain set to one that I am comfortable with.

As always any help advice is greatly appreciated.

Good riding

Nick[/font]

why would you be pedaling at 60 rpm ? all your going to do is bugger up your knees , try and keep above 75 rpm though on the flat betwwen 90 and 100 would be better .