Noisy gears

[neiljharrison]

Hi! I've just bought a new Muddyfox Pace road bike from Sports Direct online. There was loads of money off it & it was a real bargain. It came yesterday and it's a great bike, I'm really pleased with it except for one issue I have with the gears. When the chain is on the smaller of the two front cogs (next to the pedals) there is a constant rattling noise when the chain is on either the smallest or the largest of the back cogs. It's caused by the chain rubbing on the metal component that moves it when you change gear. I've tried but I can't do anything to stop it. So I phoned the Sports Direct customer helpline & explained this and I was told that this is actually normal and the rattling noise was unavoidable! I really can't believe it to be honest, I've had loads of bike like this in the past & none of them have made a noise like this before. What does anyone think about this? I'd be greatful to know what anyone thinks. Neil.

 

[Hacienda71]

You should try to avoid riding with the big cog front and big cog rear, or small cog front and small cog rear at the same time. You already have the gear ratios you would achieve by doing this with a straighter chain line and no rub on the front mech by riding in the middle of the cassette but changing your front cog. If you do ride with a poor chain line it will also put additional stress on the chain and wear your cogs quicker.

 

[fossyant]

You want the chain rub not to be present on smallest front, and largest rear, and also largest front and smallest rear.

Large large, and small small is a no-no. Once you get the above happy, you can 'trim' the front mech - i.e. give the shifter an additional click if the rubbing starts.

It just needs fine tuning, and they usually do from the box !

 

[neiljharrison]

You should try to avoid riding with the big cog front and big cog rear, or small cog front and small cog rear at the same time. You already have the gear ratios you would achieve by doing this with a straighter chain line and no rub on the front mech by riding in the middle of the cassette but changing your front cog. If you do ride with a poor chain line it will also put additional stress on the chain and wear your cogs quicker.

Thank you!

 

[neiljharrison]

You want the chain rub not to be present on smallest front, and largest rear, and also largest front and smallest rear.

Large large, and small small is a no-no. Once you get the above happy, you can 'trim' the front mech - i.e. give the shifter an additional click if the rubbing starts.

It just needs fine tuning, and they usually do from the box !

Thank you!

 

[fossyant]

Just check the adjuster screws. Takes a little fettling, but once sorted its fine. You can get more rub with a triple, but you can adjust.

There are lots of overlaps on gears, so shifting the front, just means shifting 2 or 3 gears at the back for the same ratio.

Google gear adjustment videos.

 

[neiljharrison]

Just check the adjuster screws. Takes a little fettling, but once sorted its fine. You can get more rub with a triple, but you can adjust.

There are lots of overlaps on gears, so shifting the front, just means shifting 2 or 3 gears at the back for the same ratio.

Google gear adjustment videos.

Thanks a lot. Very helpful!