Access whole cassette in each ring?

[MrWill]

I've a Shimano 105 34/50 12-25.

Should I be able to access every cassette cog, in each chain ring, WITHOUT any chain rub whatsoever?

I'm so close!

34/12 rubs a bit on front dr.

Same with 50/25.

 

[themosquitoking]

Most people would avoid the extreme chain angle gears, no need to use them really.

 

[buggi]

no, there will always be some rub at the extremes. also it is bad to run the chain at extremes (ie big cog at front to biggest on back and vice versa) because it puts pressureo n your chain and it sharpens the edge of the chain and the teeth of cogs on the rear casette, wrecking them. try to stay away from extremes, when you hear that rub, time to change up or down on the front. of course, i religously live by this rule... not! LOL

keep your chain in good working order. check for stretch regularly etc. my friend runs two chains, swaps them over every week to delay the wear and tear on the cassette. chain costs a tenner each, and this means his cassette lasts double the length of time, and obviously the cassette is a lot more.

 

[marzjennings]

No.

See Cross Chaining.

 

[MikeW-71]

I highly doubt you'll be able to do it. As said above, it's best avoided anyway.

 

[MrWill]

Ok thanks everybody.

Like the idea of two chains. Do quick links exist for Shimano 10spd? Wouldn't want to be pinning it so often.

 

[MrWill]

Quick search... anyone got exp with the KMC 10spd quick links on Shimano chains?

 

[Mr Haematocrit]

If you want to do cross chaining without rubbing you need a self trimming front much such as that found on Shimano Di2 systems

 

[slowmotion]

Quick search... anyone got exp with the KMC 10spd quick links on Shimano chains?

KMC 10 speed mising links work fine on Shimano chains. You have to pick the right one though. Here's the KMC connector range..
http://www.kmcchain.eu/products-connectors-missing_link
I got caught out recently because my bike has Campagnolo gears but a KMC chain. A Campy-specific missing link from KMC doesn't work with a KMC chain.

 

[HLaB]

Quick search... anyone got exp with the KMC 10spd quick links on Shimano chains?

My bike came like that from a lbs and it lasted 1000s of miles just fine and I've fixed mates shimano chains with one.

 

[fossyant]

If you want to do cross chaining without rubbing you need a self trimming front much such as that found on Shimano Di2 systems

Or old school down tube shifters. Heh heh

 

[fossyant]

As others have said, avoid the outer two sprockets when cross chaining. The chain line is poor and will increase wear. Best shift chain ring and 2/3 sprockets (depending upon your ratios).

 

[Dogtrousers]

Or old school down tube shifters. Heh heh

The lack of fine control of my front mech is one thing I really miss since switching to brifters (Sram Apex). I mean what is the POINT of indexing something that has two positions? Down tube friction shifters for the front were already indexed (for a double).

 

[fossyant]

The lack of fine control of my front mech is one thing I really miss since switching to brifters (Sram Apex). I mean what is the POINT of indexing something that has two positions? Down tube friction shifters for the front were already indexed (for a double).

It's part of the reason I've never updated my two vintage road bikes to STI, despite it being available just after I bought the bikes, and would still be 'period'. I like how fast you can change both the front and rear with one hand at the same time. On many a club ride, or especially a sportive, you've approached a hill in a big gear, a quick flip of the levers and I'm in the right gear with a click, click. All I can hear round me is crunch, crunch.

 

[snorri]

[QUOTE 2997829, member: 9609"] some bike gears are crap, too many overlaps.
For instance my bike pretends its a 14 speed.......but in reality its a 9 speed.
and I wish the range change was pre selectable so you didn't have to faf with two levers.[/QUOTE]
I've only got one word for you.. Rohloff.