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Old 03-08-14, 01:10 AM   #1
1938 Autocycle
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New Moulton project. Help me

Pick up this Moulton project for my wife but don't know much about them. I looked around on line but did not find much in the way of project builds or technical info.

My project has unmatched wheels and I was looking for inexpensive hoops to build wheels around that are avalable in the USA. Also looking for technical info in the fork and rear suspension system if anyone has links. Lastly anyone have plans for a simple fork straighting jig?





Thanks for any help
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Old 03-08-14, 05:50 AM   #2
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There's a group in the UK that does repairs on the suspension bits - I believe called the Moulton Preservation Society. The rims are 16 inch if I recall, and are likely to be a pain to find. The fork is a major warning sign - make sure you check the head tube and the areas around it for damage/crimping. It might be possible to have a frame builder bend it back, but that looks like toast to me.

Edit - they have rims and a fork swap out service along with the suspension repair:

http://www.moultonbuzz.com/preservation/
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Old 03-08-14, 06:27 AM   #3
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There was a shop in Wabasha, Mn that works on Moultons.

I'll see if I can find the info for you.
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Old 03-08-14, 06:38 AM   #4
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It looks like the fork was designed by Bates... some folks will get that reference.

The great thing about Moultons is that pretty much every part you need for them is available, even when it is a late 60's F.

I was very lucky to have received my Moulton in very nice condition and it had already been nicely upgraded with parts that serve my needs rather well, I only had to change the stem and bars and switched out the crank to up the gear range with the 7 speed hub.

It has to be one of the very best bicycles I have ever owned and it was a long time coming.

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Old 03-08-14, 06:41 AM   #5
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I know that I say this every time you post it, but I love that Moulton 65r, and I think what you did to it is splendid.
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Old 03-08-14, 09:23 AM   #6
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It looks like the fork was designed by Bates... some folks will get that reference.

The great thing about Moultons is that pretty much every part you need for them is available, even when it is a late 60's F.

I was very lucky to have received my Moulton in very nice condition and it had already been nicely upgraded with parts that serve my needs rather well, I only had to change the stem and bars and switched out the crank to up the gear range with the 7 speed hub.

It has to be one of the very best bicycles I have ever owned and it was a long time coming.

Sweet Moulton.

what kind of 7 speed hub are you using? Are you using a bar end shifter? If so what kind.


I found a source of cheap 16" wheels. 16" BMX bikes run a 36 hole 16" hoop and I can pick up compleat bikes in the $30 range on the local criegslist.

thanks for the Moulton info
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Old 03-08-14, 01:24 PM   #7
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Second Moulton project was thrown in with the green bike. Will probably put it together as a single speed using a pair of 16" BMX wheels and parts I have floating around. Also have an extra fork with damaged threads. If I can find the tech sheet on taking them apart I should be able to make one good fork using it at the bent green one.

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Old 03-08-14, 01:44 PM   #8
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Factory 16 inch rims were ISO349mm, but 18 inch (ISO355mm) and 17 inch (ISO369mm) will work if you adjustment the brake calipers accordingly. Tires are available in all three sizes. A quick google pulled up one or more examples of each rim size with 24 to 36 spoke holes.

There's a Moulton Bike Club and a Moulton Yahoo Group.
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Old 03-08-14, 02:09 PM   #9
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Lastly anyone have plans for a simple fork straighting jig?
simple depends on your level of shop tools available ..
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Old 03-08-14, 04:17 PM   #10
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This is mine a 1965 4 speed which was a Moulton build but sold buy Huffy. One before and a couple of after pictures. It has a couple of changes from stock. Roger
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Old 03-08-14, 05:21 PM   #11
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I found a source of cheap 16" wheels. 16" BMX bikes run a 36 hole 16" hoop and I can pick up compleat bikes in the $30 range on the local criegslist.

thanks for the Moulton info
The 16" wheels on BMX bikes are usually 305mm bead seat diameter and 16 x 1.75" tire , where the Moultons use a 349mm BSD and 16 x 1 3/8" tire. The 16 x 1.75" tire might not even fit in the Moulton's forks.

If you're on the West Coast, consult Angle Lake Cyclery near Seattle: http://www.anglelakecycle.com/ They import(ed) Moulton bikes and have the spare parts you need. Another source for good 16 x 1 3/8" tires is Bike Friday.
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Old 03-08-14, 06:48 PM   #12
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Sweet Moulton.

what kind of 7 speed hub are you using? Are you using a bar end shifter? If so what kind.

I found a source of cheap 16" wheels. 16" BMX bikes run a 36 hole 16" hoop and I can pick up compleat bikes in the $30 range on the local criegslist.

thanks for the Moulton info
It is a Shimano 7 speed with the stock shifter mounted to a clamp so that I can use it as a bar end... it works rather well this way and the range is good for the all rounder that it is. For touring I'd want to drop the low end a little but for the way it sits (it is my summer commuter) it is perfect, the 7 speed Shimano has very even gear steps.
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Old 03-09-14, 12:46 PM   #13
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The 16" wheels on BMX bikes are usually 305mm bead seat diameter and 16 x 1.75" tire , where the Moultons use a 349mm BSD and 16 x 1 3/8" tire. The 16 x 1.75" tire might not even fit in the Moulton's forks.

If you're on the West Coast, consult Angle Lake Cyclery near Seattle: http://www.anglelakecycle.com/ They import(ed) Moulton bikes and have the spare parts you need. Another source for good 16 x 1 3/8" tires is Bike Friday.

You are right. It is even worse that that. There apparently are also two sizes of 16X1 3/8 as well. The picture bellow has the BMX tire on the bottom and the two upper tires are both 16X1 3/8?!?!? Going to make ordering tires and wheels a little complicated. All this time I always assumed 16" was 16" I had no idea 16" can be so many different sizes.



With a tiny bit of filing to fit the axle into the fork I will be able to put this together as a single speed till I can put together a nice set of proper Moilton wheels.

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Old 03-09-14, 01:00 PM   #14
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You are right. It is even worse that that. There apparently are also two sizes of 16X1 3/8 as well. The picture bellow has the BMX tire on the bottom and the two upper tires are both 16X1 3/8?!?!? Going to make ordering tires and wheels a little complicated. All this time I always assumed 16" was 16" I had no idea 16" can be so many different sizes.



With a tiny bit of filing to fit the axle into the fork I will be able to put this together as a single speed till I can put together a nice set of proper Moilton wheels.
Moulton made the first full suspension mountain bike...

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Old 03-09-14, 07:01 PM   #15
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You are right. It is even worse that that. There apparently are also two sizes of 16X1 3/8 as well. The picture bellow has the BMX tire on the bottom and the two upper tires are both 16X1 3/8?!?!? Going to make ordering tires and wheels a little complicated. All this time I always assumed 16" was 16" I had no idea 16" can be so many different sizes.
Yep. From Sheldon's chart:

349 mm 16 x 1 3/8
337 mm 16 x 1 3/8
317 mm 16 x 1 3/4
305 mm 16 x 1.75- x 2.125

Only slightly better than the "26-inch" tire situation.

Primo Comets would be very nice on your bike:
http://www.everybicycletire.com/Shop...comet-349.aspx
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Old 03-09-14, 10:37 PM   #16
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It is a Shimano 7 speed with the stock shifter mounted to a clamp so that I can use it as a bar end... it works rather well this way and the range is good for the all rounder that it is. For touring I'd want to drop the low end a little but for the way it sits (it is my summer commuter) it is perfect, the 7 speed Shimano has very even gear steps.
I am looking into building up a set of wheels with a Shimano nexus 7 speed inturnal hub. My frame is approximately 120mm spacing. Did you have trouble spreading your frame for the wider spacing of the 7 speed hub? Did you have to mod the fork to accept the modern front hub and quick release?

Got the bike rolling in single speed mode. What a great riding bike. I am so excited to get these bikes put together and putting some miles on them.
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Old 03-22-14, 05:06 PM   #17
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Looks like some of the modern Sturmy Archer 5 speed hubs have sub 120mm spacing. Can anyone give me direction on which hub would be a good choice?

thanks for any input
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Old 03-22-14, 05:17 PM   #18
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Looks like some of the modern Sturmy Archer 5 speed hubs have sub 120mm spacing. Can anyone give me direction on which hub would be a good choice?

thanks for any input
My suggestion is to use a SA 5-speed hub. While the Shimano Nexus 7 has very evenly spaced steps, the range it not that much more than a SA 5-speed hub. Add to that the fact you would need to cold-set the rear dropouts and it becomes a larger project.

One other thing that comes to mind, at least for me, is that an old English steed like that Moulton should have an old English hub like a Sturmey-Archer.
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Old 03-22-14, 05:37 PM   #19
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Isn't the fork Installed backwards on the green bike? The fender stays are frontside..Flickr has two Moulton pages. My Moulton four is on there somewhere.
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Old 03-22-14, 05:53 PM   #20
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My suggestion is to use a SA 5-speed hub. While the Shimano Nexus 7 has very evenly spaced steps, the range it not that much more than a SA 5-speed hub. Add to that the fact you would need to cold-set the rear dropouts and it becomes a larger project.
That is what I am thinking. Any input on what model SA 5 speed with sub 120mm would be a good choice? There are so many models I am getting a little lost making a choice.
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Old 03-22-14, 05:55 PM   #21
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Isn't the fork Installed backwards on the green bike? The fender stays are frontside..Flickr has two Moulton pages. My Moulton four is on there somewhere.
Yes the previous owner mounted it backwards because it is severely bent. I will put it right when I overhaul the bike
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Old 03-22-14, 06:27 PM   #22
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That is what I am thinking. Any input on what model SA 5 speed with sub 120mm would be a good choice? There are so many models I am getting a little lost making a choice.
Of the new production versions the S-RF5(W) or X-RF5(W) would work as you can get both of those in 119 OLD. If you are patient, you could probably find an original SA S5 on eBay.
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Old 03-22-14, 06:52 PM   #23
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Pick up this Moulton project for my wife but don't know much about them. I looked around on line but did not find much in the way of project builds or technical info.
You might find this, from the Moulton Bicycle Club, useful:
Open Discussion Group | Forum | Explicit suspension pictures ? F-frame | Moulton Bicycle Club
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Old 03-23-14, 07:50 PM   #24
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Just what I was looking for. Thanks
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Old 03-27-14, 02:26 PM   #25
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