Jockey wheels - need some

[mikesbytes]

Any suggestions on which jockey wheels to buy and where to get them from.

I need 2 sets, both for Tigra derailers.

[}SkOrPn--7]

Not sure if these fit that derailleur but for my last two sets I have purchased I have used them. I find that there cheaper than Shimano and last longer not too mention you get fully sealed ball bearings in both lower/upper pulleys.

http://www.bbbparts.com/pulleys.php

I purchased mine from

http://www.deanwoods.com.au/store/category410_1.htm

[mikesbytes]

Not sure if these fit that derailleur but for my last two sets I have purchased I have used them. I find that there cheaper than Shimano and last longer not too mention you get fully sealed ball bearings in both lower/upper pulleys.

http://www.bbbparts.com/pulleys.php

I purchased mine from

http://www.deanwoods.com.au/store/category410_1.htm

$20 ain't bad at all.

What's the difference between 10 and 11 ?

[jasimon]

What's the difference between 10 and 11 ?

Tooth wear. Most newer ones are 11 tooth. An odd number of teeth evens out the tooth wear to make sure that the jockey wheel teeth are not always getting an inner or outer link.

[Kalgrm]

Larger wheel also means the chain bends less, so theoretically, it should have a lower friction loss.

Cheers,
Graeme

[il padrone]

+1 on those BBB jockey wheels. I've used them as replacements, iirc they're sealed bearing pulleys.

[mikesbytes]

Thanks Guys, I'll order 2 sets of the 11's

[heavymetal]

+1 on the BBB jockey wheels. I replaced the original shimano ones after the top one exploded (no bearings).

The good thing about the BBB ones is that they come in colours.

Kev.

[Mulger bill]

Thanks Guys, I'll order 2 sets of the 11's

You won't regret it Mike, but forget the colours, they all look the same after 1000kms

Shaun

[mikesbytes]

Just one passing thought, will I have a size problem with using 11 on my Tigra derailiers?

[munga]

*snickers*

[heavymetal]

Just one passing thought, will I have a size problem with using 11 on my Tigra derailiers?

When I brought mine they came with a bag loaded with all sorts of spacers for different derailleurs.

Kev.

[sogood]

When I brought mine they came with a bag loaded with all sorts of spacers for different derailleurs.

Why would you need spacers? B/n the RD arms?

[mikesbytes]

Just one passing thought, will I have a size problem with using 11 on my Tigra derailiers?

When I brought mine they came with a bag loaded with all sorts of spacers for different derailleurs.

Kev.

Good point, I wasn't thinking of width.

What about if the teeth of the jockey or chain might hit due to the larger diameter ?

[heavymetal]

Why would you need spacers? B/n the RD arms?

I wondered the same myself and pulled out a few other RD from my collection. On some, the joining bolts have a wider part than the thread, resulting in a wobbly jockey wheel as the cage can't be closed to the width of the wheels.

A washer would probably do the same job, but the jockey wheels I brought came with little spacers instead. Luckily I didn't need them on my RD.

Kev.

[heavymetal]

What about if the teeth of the jockey or chain might hit due to the larger diameter ?

I'm not an expert, but I thought the diameters were the same, only more teeth.

I inadvertently changed mine from 10T to 11T and haven't had any problems, but the RD was a 9 speed to begin with, but fitted with 10T by the company when the bike was built to accommodate the 8 speed rear cluster.

Kev.

[Kalgrm]

I'm not an expert, but I thought the diameters were the same, only more teeth.

I'm not sure how that's possible. It implies the teeth would have a tighter spacing, meaning they would no longer mesh with the spacing on the chain links.

Cheers,
Graeme

[heavymetal]

I'm not an expert, but I thought the diameters were the same, only more teeth.

I'm not sure how that's possible. It implies the teeth would have a tighter spacing, meaning they would no longer mesh with the spacing on the chain links.

You're right, hence I said I'm no expert. I don't have the old ones to compare with as one exploded into a million bits and the other got thrown in a rage of disgust after I discovered they were made out of compressed horse manure and had no bearings.

There's probably not much of difference in diameter, and if there is, don't tell mike anyway Let him find out and tell us the answer

Kev.

[sogood]

I have seen some huge after market jockey wheels fitted on standard road RDs. Supposedly they reduce transmission friction but sounded like good gimmics to me.

[Nobody]

You're right, hence I said I'm no expert. I don't have the old ones to compare with as one exploded into a million bits and the other got thrown in a rage of disgust after I discovered they were made out of compressed horse manure and had no bearings.

Good to see Shimano is recycling.

[Nobody]

I have seen some huge after market jockey wheels fitted on standard road RDs. Supposedly they reduce transmission friction but sounded like good gimmics to me.

I see these on cheaper bikes. I think one of the bikes in my family has one. Might take a look. I think they do this to run even cheaper (or no) bushes. The weight weenies wouldn't like them either as they look heavy regardless of what they weigh.

[sogood]

I see these on cheaper bikes. I think one of the bikes in my family has one. Might take a look. I think they do this to run even cheaper (or no) bushes. The weight weenies wouldn't like them either as they look heavy regardless of what they weigh.

The one in the photo is made of CF and is fitted to a DA RD. It ain't cheap that's for sure.

[mikesbytes]

I've heard that a fixie has a 99% efficient chain drive where a derailier style geard bike is 98%. So what happens to the 1% ?

[Nobody]

I've heard that a fixie has a 99% efficient chain drive where a derailier style geard bike is 98%. So what happens to the 1% ?

Heat due to more friction and noise.

[sogood]

I've heard that a fixie has a 99% efficient chain drive where a derailier style geard bike is 98%. So what happens to the 1% ?

Cross chaining, extra bearings, poor derailleur trim etc. However, the gears makes the bike more rideable on climbs and descents, more than make up that 1% deficiency. A better tuck would also give you more than 1%.