Bicycle Mechanics - Where can I buy a "Shark Tooth"????

Hi

At a race recently I saw a Tandem with a "shark tooth" fitted. It is a device made out of plastic that fits on the saddle downtube and stops the chain from being dropped to the inside of the chainwheels. The tandem has an 34,9 mm downtube.

Thanx in advance

Big H

http://www.3rd-eye.com/(01).htm here is what you miught have seen Most shops around here stock them, check your LBS.

How about just keeping your derailleurs properly tuned, thus removing the need for extra doohickeys attached to your bike. I got a cell phone call from a friend of mine a couple of weeks ago. One of her cycling partners had a bike with one of those 3rd eye things on it. The chain came off anyway and was wedged under the stupid thing so badly that they couldn't get the chain back on the rings. I told them to take it off and throw it into the nearest trash can.

How about just keeping your derailleurs properly tuned, thus removing the need for extra doohickeys attached to your bike. I got a cell phone call from a friend of mine a couple of weeks ago. One of her cycling partners had a bike with one of those 3rd eye things on it. The chain came off anyway and was wedged under the stupid thing so badly that they couldn't get the chain back on the rings. I told them to take it off and throw it into the nearest trash can.

I've looked closely at some pics of pro cyclists during races and seen that on their bikes. I guess the team mechanics suck too. ;)

I have yet to see a pro using one...

Perhaps look into chain tensioners, plastic wheels that carry the chain just behind the chainring.
Makes it near impossible to jump off. ( Bash rings, inner and outer, do the same.)
-downhill, bxm ones are more for mono front chainring, and are lower on the chainstay mounted. More of a derailer tension device.

I think you could, or they would have a device similar for the seat post tube, to tension the chain coming onto the chainring.

Seen it some place? If your not sure what i'm talking about, I'll find a pic.
I built mine from parts of a 16 mm film projector, works fine. Mine is for the jump\ DH bike lower mounting.

Some ideas..G-luck
Jef.

I have yet to see a pro using one...

I remember it on a bike Ridden by Pantani for sure. maybe the drugs kept him from keeping the chain on.

i'm looking for the pic now

I have yet to see a pro using one...

pantani (http://www.cyclingphotography.co.uk/images/pantani003.jpg)


there it is. now you have ;)

Never said pro wrenches suck. Just said that keeping your bike tuned is easier than making some inventor dude rich by purchasing a needless thingy.

I was thinking y'all were talking MTB's for some reason... I still can say I haven't seen any MTB pros with one.

Well..MTBers find a way to break ANYTHING, ya know :rolleyes:

pantani (http://www.cyclingphotography.co.uk/images/pantani003.jpg)


there it is. now you have ;)


I wonder if the downtube shifters had anything to do with it? ;)

I wonder if the downtube shifters had anything to do with it? ;)

yep, these kids nowadays...index shifting my butt. We knew how to shift with down tube shifters. Now it's all "i can't take my hands off the bars". We took our hands of the bars at 75 mph, shifting up to the 64 tooth ring, while making a U-turn at the bottom of the mountain so we could do it all again.

Chain minders...when i was growing up, you moved that chain with your fingers. I tell ya...and another thing... ;)