Bike derailleur adjustment

grizzly1911

Billy-no-Money wrote: »

Before this happened did the chain run smoothly if you turned the pedals backwards?

Not sure it is the wife's bike I will ask but....

The 'dropout' you're referring to, by the way, is probably the 'hanger'; this is (I think) made of steel and designed to bend or break sacrificially, protecting the dropout itself, which is part of the frame. This (again I think) is necessary on aluminium frames, because you can't bend them back into shape.

Yes that is what I read, to save the frame.

It was an aluminum casting I think, it didn't look machined. Some of the ones I saw advertised where much more precison jobs with CNC milling etc. as you suggest.

I have replaced it like for like. there are over 200 designs for different hangers:eek:

Cassette it is then, if it won't adjust, Iknow you are all probably right I just have to try.

thelawnet

grizzly1911 wrote: »

Cassette it is then, if it won't adjust, Iknow you are all probably right I just have to try.

Just take it to the LBS?

grizzly1911

thelawnet wrote: »

Just take it to the LBS?

Not very MSE, I have the time and it's interesting;)

The original cassette is a HG30 -8I The original is discontinued according to some stores.

Any idea whether this

http://www.winstanleysbikes.co.uk/product/12061/Shimano_HG40_MTB_Cassette_8Speed

is likely to be interchangeable with this in 11 - 34 guise - appears the same to me.

http://www.cyclesportsuk.co.uk/product_info.php?products_id=10626

Only thing is the locking tool is different to the one for the HG30;-(

thanks again all

Billy-no-Money

Sorry for the late reply:

I believe all current Shimano 8-speed cassettes are interchangeable and use the same lockring tool; as long as the 'range' of each cassette is similar.

So for example: 11-32 and 11-34 should both be OK.

It's also useful to know that SRAM 8-speed cassettes are also interchangeable with Shimano.

I'm not sure what you mean about the lockring tool being different; it should be the same for the two you've mentioned. For anyone reading this with a seven-speed 'cassette', the picture might be different - most seven-speeds are actually 'freewheels', which look similar but are fitted differently.