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Single speed chain ring/crank


SteveS

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Hi

 

I am busy converting an old Diamond Back MTB into a single speed. I already have a DMR chain tensioner with 18 tooth cog. I now need to convert the Truvativ triple chainring MTB crank into a 32 tooth single speed. I hear it can be done with some sort of adapter and a SS chainring. If so where in JHB can I buy this or am I looking at a new SS crank?

 

Thanks

Steve
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Why not just remove the granny and big blade, i assume your middle is already a 32?!? The chain tensioner will keep the chain on, no problem! If you are then sold on the SS thing you can get new cranks, machine the old spider to remove unwanted mounts or install a protector ring.

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Hi Steel Niner.

 

Thanks. Thats sounds like the best idea. Will the 8 speed chain that is on there currently work with the 18 tooth cog that comes with the DMR tensisioner?
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Be hardcore: remove the middle and granny blades!

 

 

 

But with one of the top blades removed, will the bolts have enough to grip on? I think not. You will need a steel protector thingy...

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Thanks Thug. It is seldom that the cheapest option is the best option. So do you guys think I can use the 8 speed chain?

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Hi the bolts will need a washer of sorts as they are too long, I used the old suspension spacers off a Scott Genius kit they are perfectly sized for the job.

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Get washers from a hardware shop, to replace the rings you have removed. The middle ring may go on the outside, but then you may need a shorter axcel to line up with the rear sprocket.

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check your chain line is straight so move blade to the position to suit like Anfielder says.

BTW make sure not to use Track or fixed gear chainrings, -sprockets, and -chains. They are 1/8inch wide(wider (or thicker??) than geared bikes' drivetrain)
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Hi the bolts will need a washer of sorts as they are too long' date=' I used the old suspension spacers off a Scott Genius kit they are perfectly sized for the job.[/quote']

 

 

 

watched a youtube vid the other day where a guy cut the bolts back. lot of pt, but it worked.

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I'm doing the same to my giant now, I'm keeping the 44 tooth crank ring. Then I'm leaving a 21 on the back.  trying to not use the tensioner.

the bikes are pilling up.
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I'm doing the same to my giant now' date=' I'm keeping the 44 tooth crank ring. Then I'm leaving a 21 on the back.  trying to not use the tensioner.

the bikes are pilling up.
[/quote']

 

That's a 56.57 inch gear. Like to see you going down hill on that?? Your legs may unscrew. Better put two brakes on the bike!

How do you lock the sprocket on the rear wheel? or are you using a track hub?

 
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I'm doing the same to my giant now' date=' I'm keeping the 44 tooth crank ring. Then I'm leaving a 21 on the back.  trying to not use the tensioner.

the bikes are pilling up.
[/quote']

 

Thats a 56.57 inch gear, Like to see you going down hill on that, your legs may unscrew!!

How do you lock the sprocket on the rear hub? or are you using a track hub?
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I'm doing the same to my giant now' date=' I'm keeping the 44 tooth crank ring. Then I'm leaving a 21 on the back.  trying to not use the tensioner.

the bikes are pilling up.
[/quote']

 

Thats a 56.57 inch gear, Like to see you going down hill on that, your legs may unscrew!!

How do you lock the sprocket on the rear hub? or are you using a track hub?

 

The giant's a mtbike, and I'm using the normal 9spd hub. but on the fixie I have a 44/16. were I'm using a flipflop hub. that also has no brakes, so the legs do the stoping.
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