Rear dropout and derailleur adjustment

[47p2]

Ever since my daughter keeled over on the Peugeot earlier this year (blame the clipless pedals) the gear changes have not been the same. I tried a few times to rectify the problem but the SIS gear changes were never quite as crisp as they used to be so I decided that apart from a buckled wheel which I had repaired, something must have gotten bent.

I decided to purchase a couple of tools to assist in my plight for perfectly smooth Shimano 105'ness gear changes

Firstly I bought a Park Tools derailleur hanger alignment gauge (DAG-2), this was set up and showed the hanger to be out by quite a bit, so after resetting the hanger things improved but it still wasn't perfect

I then bought a Cyclus Drop Out Alignment tool (less than half the price of the equivalent Park Tools FFG-2)

So this morning I set up the Cyclus and it showed the rear dropouts were indeed out by a few mm, after a bit of frame bending it was looking much better

So I refitted the wheel and reset the hanger again

I adjusted the derailleur and it is now working as it should, so I will have the Peugeot for a while longer

 

[Robbied196]

As my wife always says, you've got to have the right tool for the job

 

[bikenut2010]

As my wife always says, you've got to have the right tool for the job

 

[Synthesis]

You will be gutted if you ever try the Drop out tools on a modern carbon frame, they are never in line. A while back I did that to a McLaren Venge from specialized, 5mm out of alignment...

 

[argonsixar]

Now I am intrigued, can a modern carbon frame actually be realigned in the same way ? I assume not , or am I wrong ?

 

[Midlife]

Not as far as I am aware.........how it comes out of the oven, that's it !

The Cycling mags give a score to the geometry when they test them.

Shaun

 

[TGR]

Very interesting Mr Bond,

So to carry out the checks and modification - both tools are required - and in your case, the hanger was out of alignment, as were the dropouts. Does the Park tool adjust the hanger alignment? How did you 'reset' it?

And a further nosey question - can the dropout alignment tool be used to increase/decrease rear spacing ie spread 126mm to 130mm etc?

Thanks,

Richard