.My question is ... Any idea what happened to the derailleur the day before? Cable was fine, as said no load on peddles or gear changes.
Martin
Cycling with a twist
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malverncyclist
- Posts: 224
- Joined: 7 Apr 2010, 12:17pm
Cycling with a twist
I have just completed an 800 mile trip from Malvern to Bonn, where I'm originally from. It was a great, 14 day ride, partly on my own, partly with friends. Interesting and expensive twist in the journey: in the middle of Belgium, lunchtime, small town I am ambling along, no pressure on pedals, no gear changing and I sudden, horrible noise from the back brought me to a stop. The derailleur had twisted itself into the wheel/spokes, no idea ho that can happen. Could just about wheel the bike back into the town, went into police station to ask for nearest bikeshop and how to get there. 10 minutes later my mate and I are in two separate police vans on our way to the next town (Wavre) to have my bike fixed. All sorted in 20 minutes. Unfortunately next day a spoke broke and the guy in the bike shop in Dinan showed me the worn spokes around the cassette. In his view the result of too much tension, loaded bike Andover Belgian roads. S needed a new wheel .
My question is ... Any idea what happened to the derailleur the day before? Cable was fine, as said no load on peddles or gear changes.
Martin
.My question is ... Any idea what happened to the derailleur the day before? Cable was fine, as said no load on peddles or gear changes.
Martin
Re: Cycling with a twist
Chewed-up spokes behind the cassette are caused by jamming the chain between the cassette and the spokes.
If that has been happening, it means the R. mech. is too close to the spokes anyway, and something quite slight could prove expensive.
If that has been happening, it means the R. mech. is too close to the spokes anyway, and something quite slight could prove expensive.
Bike fitting D.I.Y. .....http://wheel-easy.org.uk/wp-content/upl ... -2017a.pdf
Tracks in the Dales etc...http://www.flickr.com/photos/52358536@N06/collections/
Remember, anything you do (or don't do) to your bike can have safety implications
Tracks in the Dales etc...http://www.flickr.com/photos/52358536@N06/collections/
Remember, anything you do (or don't do) to your bike can have safety implications
Re: Cycling with a twist
If the rear mech is too close to the spokes when in the large sprocket, it is possible for a random bump to wobble it enough for it to catch the spokes, especially if the mech pivots are a bit worn.
The mech wouldn't normally get that close to the spokes unless the gear hanger it screws into was bent in some crash, or even just by the bike falling over.
Check your new mech to make sure that the main arm is vertical when viewed from the rear of the bike.
If it's not, either order a replacement gear hanger, or just bend it straight.
Replacement hangers are very much model specific, so either order via a dealer who sells your bike maker's range or go online (eg http://www.gear-hanger.co.uk/)
Bending is necessary if the gear hanger isn't replaceable. It's best to let a shop do it. or get the correct tool (eg http://www.bike-discount.de/shop/a9183/ ... -tool.html), as it's not always obvious how much to bend, and it's best to keep bending back anf forth to the absolute minimum.
The mech wouldn't normally get that close to the spokes unless the gear hanger it screws into was bent in some crash, or even just by the bike falling over.
Check your new mech to make sure that the main arm is vertical when viewed from the rear of the bike.
If it's not, either order a replacement gear hanger, or just bend it straight.
Replacement hangers are very much model specific, so either order via a dealer who sells your bike maker's range or go online (eg http://www.gear-hanger.co.uk/)
Bending is necessary if the gear hanger isn't replaceable. It's best to let a shop do it. or get the correct tool (eg http://www.bike-discount.de/shop/a9183/ ... -tool.html), as it's not always obvious how much to bend, and it's best to keep bending back anf forth to the absolute minimum.