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1968Cota247

1968 Cota 247 Rim Lock / bead lock

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What size rim locks/ bead locks do i need for a 1968 Cota 247

I have akront rims and will run 2.75x21 front and 4.00x18 rear.

 

Thanks

 

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2.75 x 21 is a WM1 rim, 4.00 x 18 is a WM2 rim. Rim locks are identified as for WM1, WM2, WM3,etc. rims.

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A 247 rear will probably be wm3. 4.0 x18 can be either 2 or 3.

 

 

Edited by b40rt
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Rim info FYI. Rim lock needs to be suitable for size of rim and 21" rims are not always the same WM number - I know that from experience Hondas have used both 1.6 and 1.85 (WM1 and 2) on trials bikes.

rims.pdf

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The tyre clamp size is the distance between the flanges in inches. 1.85 clamp fits rim with 1.85 inches between the flanges

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14 hours ago, nh014 said:

2.75 x 21 is a WM1 rim, 4.00 x 18 is a WM2 rim. Rim locks are identified as for WM1, WM2, WM3,etc. rims.

so 1.60 for the front and a 1.85 for the rear?

 

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So I took the old tires off and measured the front 21" and rear 18" rim. They are both 1.60 +/-

These are akront rims and i believe them to be original to this bike, (1968/1969 year) 21M00389

 

IMG_0118.jpg

IMG_0119.jpg

Edited by 1968Cota247

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On 10/26/2021 at 4:50 PM, lineaway said:

 The rim should have the size stamped in it. I does not go by tire size.

Only stamp on rim is on WP

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Unusual to have such a narrow rim on the rear I would have thought, but the caliper doesn't lie. I would think that you will need two at 1.60" or WM1...............

 

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On 10/28/2021 at 12:50 PM, 1968Cota247 said:

So I took the old tires off and measured the front 21" and rear 18" rim. They are both 1.60 +/-

These are akront rims and i believe them to be original to this bike, (1968/1969 year) 21M00389

 

IMG_0118.jpg

IMG_0119.jpg

I've got a 1960's rear rim that width taken from a Bultaco so I'm not surprised to see that your old Cota has one too.

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