Freewheel spacing problem

[cbjim]

Hi all

I bought this bike mainly because I wanted the frame. For the time being I was hoping to keep the back wheel but replace the freewheel. The rear forks have a spacing of 125mm, however there isn't enough space for the chain on the smallest cog of the 5 speed freewheel. The wheel hub seems the correct size but there appears to be quite a large gap ( 10mm ) between the freewheel and the spokes.

<a href="http://s1180.photobucket.com/user/cbjim/media/IMG_7629_zps39vqfzyc.jpg.html" target="_blank"><img src="http://i1180.photobucket.com/albums/x419/cbjim/IMG_7629_zps39vqfzyc.jpg" border="0" alt=" photo IMG_7629_zps39vqfzyc.jpg"/></a>

Anyone offer some advice ?

 

[cbjim]

Re:

Hmmmmm :roll: seems that I need to master picture posting first

 

[cbjim]

Re:

 

[hamster]

I see what you mean. Check the freewheel is fully screwed on, also whether somebody has fitted a spacer between the freewheel and the hub to offset it.

I'm also just wondering if it's been dished to take a single speed freewheel.

 

[Midlife]

Have you got a picture of the other side? Has someone swapped some spacers from the drive side to the none drive side, as above, might have been done to make it a single speed?

Shaun

 

[cbjim]

Re:

Thanks for the help

The freewheel is screwed on tightly and there are no spacers on the other side of the hub. Its a 5 speed zc Shimano freewheel on a sunshine 5345 B hub. I was just about to remove the freewheel but it turns out I don't have a Shimano style remover :cry:

Here is a better p icture

 

[Cefnbikie]

Some 5-speed freewheels are a bit wider because the larger sprockets are splined, and fit against a flange at the back of the freewheel. I have a couple of Shimano freewheels like this, and overall they are about 3mm wider than a couple of Regina freewheels I have where all the sprockets screw on. The stack width across the 5 sprockets is about the same with my Shimano and Regina 5-speed blocks.

I wonder whether your wheel was originally fitted with a freewheel where all the sprockets were screw-on.

 

[cbjim]

Re:

The current freewheel is only @ 27mm, so I don't think that I am going to find anything narrower. The problem seems to be either the hub is incorrect or I need a freewheel where the side of the largest cog goes partially over the hub, like a suntour ultra 6. Does that make sense ?

Either way, I am not knowledgeable enough in these matters to know what is correct/possible.

Anyone got any thoughts ?

Also can anyone point me in the right direction for the freewheel remover there seem to be so many variants?

Thanks Guys

 

[Cefnbikie]

I have measured the overall width of my Shimano and Regina 5-speed freewheels, and the Shimano is 27.3mm and the Regina ones 24.2mm and 24.4mm.

I have recently seen online that Regina freewheels were meant to have been unreliable, but that was not my experience. I used Regina freewheeels from the mid-60s until the early 90s, and they proved very reliable. During that time I wore out quite a number of Regina Extra, Oro and GS Course freewheel bodies and lots of sprockets, but I never had a failure of the freewheel mechanism.

The pitch (distance between sprocket centre lines) with the Regina freewheels vary between 5.5mm and 6.5mm on the same freewheel. The Maillard Sachs Aris blocks that I have have a pitch of 5.2 to 5.5mm. I have no experience of Sun Tour Ultra 6, but I have a record that they have a 5mm pitch.

The freewheel remover I have used with my Shimano freewheels is a Maillard Sachs Aris remover. It is a little loose in the Shimano freewheel, but it is a loose in the Sachs Aris freewheels, too!

 

[mattsccm]

Re:

Others might disagree but as far as I am concerned it was pretty well standard practice to take a file to the dropout where the chain touches. It will only be the odd mm of weld. Respected books used to suggest this but I am damned if I can remember which. Steve Snowling?