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55 mm front hub

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AlanD
Starting Member

USA
11 Posts

Posted - 06/04/2012 : 13:27:53

I have an M5 with a narrow front fork.
The wheel hub is 55 mm.
I would like to try building my own front wheel.
Any one know a good source for something like this?
Thanks.

Larry Lem
human power supergeek

South Sandwich Islands
1971 Posts

Posted - 06/04/2012 : 13:58:40

source for determining spoke lengths? buying spokes? selecting/buying a rim?

Larry Lem

AlanD
Starting Member

USA
11 Posts

Posted - 06/04/2012 : 17:22:21

A source for a 55mm hub.

airxxxwolf
New Member

USA
96 Posts

Posted - 06/04/2012 : 17:42:51

Hey Alan,
I can make a 55mm hub.....how many do you want?

Don
BBM Racing Components
bbmracing@yahoo.com

Jeff Wills
human power supergeek

USA
1123 Posts

Posted - 06/04/2012 : 18:55:58

quote:
Originally posted by airxxxwolf

Hey Alan,
I can make a 55mm hub.....how many do you want?

Don
BBM Racing Components
bbmracing@yahoo.com

I'm pretty sure Don or M5 will be your only source. There were some 80mm width Mavic hubs made, but they were rare as hen's teeth back when they were being manufactured:
http://www.velobase.com/ViewComponent.aspx?ID=C4CED345-E01F-4AEB-A0A9-BB372EB9A998&Enum=110&AbsPos=7

__________________
Jeff Wills
All my bikes:
http://home.comcast.net/~jeff_wills/Gallery/index.html

mhelander
recumbent enthusiast

Finland
257 Posts

Posted - 06/04/2012 : 22:31:32

I had to rebuild my M5 451 wheel... and late model 55mm hub uses non-bent spokes. So I ended up ordering set of spokes from Bram@M5.

What's good in this spesific hub:

It is ultra-light. No excess metal anywhere

It has lubrication nipple. Might be handy if using bearings which have only outer dust cover

Seems to be very durable.

What I don't like:

15mm axle is solid steel. Too heavy. I'm considering fabricating hollow one from 7075 aluminium or carbon...

When in need for spoke replacement bearings must be removed (as bearing locks spokes in place which is on the other hand good for not loosing those totally if nipples unthread as did for me)

Bearings will get loose. I had to use thread locking compound to keep my previous SKF bearings in place, and now SKF E2 bearings are loose, again.

I'm assuming AlanD does axle himself and uses normal fork instead of monofork for which 55mm hub's been designed. Will be easier as fabricating hollow 15mm axle is not hard, aka Hope which uses end caps to fit hub to normal 10mm road dropouts (among other dropout types).

Cheers,
-Mika

MetaPhysic 700c @ 2011, M5 CrMo Lowracer @ 2010

AlanD
Starting Member

USA
11 Posts

Posted - 06/05/2012 : 01:08:56

1. Don: I will contact you directly.

2. mhelander: Thanks. How many spokes does your front wheel have?

mhelander
recumbent enthusiast

Finland
257 Posts

Posted - 06/05/2012 : 01:58:09

quote:
Originally posted by AlanD

2. mhelander: Thanks. How many spokes does your front wheel have?

Mine has 28 radial 2mm spokes.

Cheers,
-Mika

MetaPhysic 700c @ 2011, M5 CrMo Lowracer @ 2010

Edited by - mhelander on 06/05/2012 02:01:18

alevand
human power supergeek

USA
1645 Posts

Posted - 06/05/2012 : 04:19:25

There are applets on the web to determine spoke length, just Google it.

C:
Tony Levand

AlanD
Starting Member

USA
11 Posts

Posted - 06/07/2012 : 12:43:21

I contacted M5... and Bram said he can provide these hubs. I was only wondering if there was an
alternate source.
Thanks for the advice.

mhelander
recumbent enthusiast

Finland
257 Posts

Posted - 06/07/2012 : 22:24:22

quote:
Originally posted by AlanD

I contacted M5... and Bram said he can provide these hubs. I was only wondering if there was an
alternate source.
Thanks for the advice.

I would be surprised if there's another source. Please keep me/us updated if there's one...

Cheers,
-Mika

MetaPhysic 700c @ 2011, M5 CrMo Lowracer @ 2010

Jeff Wills
human power supergeek

USA
1123 Posts

Posted - 06/08/2012 : 20:33:35

Bike Friday sells a narrow front hub:
https://bikefriday.com/thestore/product_info.php?cPath=26&products_id=12802
but they don't specify how narrow. I bet Rob English would know.

__________________
Jeff Wills
All my bikes:
http://home.comcast.net/~jeff_wills/Gallery/index.html

Edited by - Jeff Wills on 06/08/2012 20:33:52

Runxner
recumbent enthusiast

Australia
327 Posts

Posted - 06/09/2012 : 01:56:11

Looks like 74mm http://www.ebay.com/itm/Phil-Wood-74mm-Brompton-Bike-Friday-Tikit-hub-silver-/140765657279?pt=Cycling_Parts_Accessories&hash=item20c64978bf

Team Low-Life
Lowracer Test Pilot/Evangelist
Adelaide, Australia

alevand
human power supergeek

USA
1645 Posts

Posted - 06/09/2012 : 04:50:31

I made this one yesterday: 2 1/4 inches nut to nut.

Still need to trim the axle down.

Is radial lacing dangerous on an old hub?

C:
Tony Levand

Speedbiker
human power supergeek

USA
1995 Posts

Posted - 06/09/2012 : 09:16:48

Only if it is bonded together... Ha ha.

alevand
human power supergeek

USA
1645 Posts

Posted - 06/09/2012 : 11:50:42

Good, since it's press fit together.

C:
Tony Levand

mhelander
recumbent enthusiast

Finland
257 Posts

Posted - 06/09/2012 : 13:06:04

quote:
Originally posted by alevand

Is radial lacing dangerous on an old hub?

To maximize hub's stability I would at least lace it 1-cross minimum. Crossing spokes doesn't add that much spoke length and thus weight.

Use Double butted spokes, for example, DT-Swiss revolution 2.0/1.5 with aluminium nipples, if saving weight.

Cheers,
-Mika

MetaPhysic 700c @ 2011, M5 CrMo Lowracer @ 2010

Jeff Wills
human power supergeek

USA
1123 Posts

Posted - 06/09/2012 : 19:30:14

quote:
Originally posted by alevand
Is radial lacing dangerous on an old hub?

In general, yes. The old spokes will have created divots in the old shell where the bends lay. Also, older hubs weren't designed for radial lacing and thus have less material from the spoke hole to the edge.

A while back I laced a wheel to an old Shimano high-flange hub in a crow's foot pattern- 2/3 tangential, 1/3 radial. After a couple months, the hub was cracked at the radial spokes, all the way around.

That hub, if it's never been laced before, might be OK. I wouldn't take the chance, though- if the flange breaks, bad things happen.

__________________
Jeff Wills
All my bikes:
http://home.comcast.net/~jeff_wills/Gallery/index.html

alevand
human power supergeek

USA
1645 Posts

Posted - 06/10/2012 : 06:27:58

I thought about a cross 1 pattern, and it would work with the same length spoke. The cross was halfway out from the hub. The angle didn't look like it was gaining much hub thickness, but then again, metal fatigue is logarithmic. The bend in the spokes might make the wheel more compliant. The radial pattern is much stiffer than the last wheel I laced with cross 3 double butted spokes. I think butted spokes would be best too for this wheel. I had these spokes from a 26 inch wheel and thought I'd try them, since the radial pattern would maximise the lateral stiffness of the narrow hub. It looks cool.

... I changed some spokes to cross one.. It really puts too much bend in the spoke.

I'll have to order some butted spokes for cross 2 pattern.

C:
Tony Levand

Edited by - alevand on 06/10/2012 07:33:52

warren
human power expert

4229 Posts

Posted - 06/10/2012 : 07:45:42

Tony,

In your cross pattern you have the outside spoke crossing under the inside spoke, that's why you have too much bend.

-Warren.

Larry Lem
human power supergeek

South Sandwich Islands
1971 Posts

Posted - 06/10/2012 : 08:51:36

Is Warren suggesting that one should not interlace spokes in a 1X pattern? Because the cross is too near the hub?

(I've never made a 1X wheel. All of mine are 2X or 3X so the cross where I interlace is further away from the hub and the bend in the spokes near the hub is not so severe.)

Larry Lem

Edited by - Larry Lem on 06/10/2012 08:53:44

Jeff Wills
human power supergeek

USA
1123 Posts

Posted - 06/10/2012 : 08:59:26

quote:
Originally posted by alevand

... I changed some spokes to cross one.. It really puts too much bend in the spoke.

A lot of that bend will go away once the spokes are tensioned, stress-relieved, and tensioned again. However, I agree with Larry- 2X or 3X isn't that much heavier, and the safety margin of the wheel goes way up.

__________________
Jeff Wills
All my bikes:
http://home.comcast.net/~jeff_wills/Gallery/index.html

alevand
human power supergeek

USA
1645 Posts

Posted - 06/10/2012 : 09:10:19

Jeff, those are tight, but not stressed.

It doesn't look too bad when the spokes are not interlaced, it's about a 30 degree tangent angle.

C:
Tony Levand

Edited by - alevand on 06/10/2012 09:23:51

Jeff Wills
human power supergeek

USA
1123 Posts

Posted - 06/10/2012 : 12:13:55

Once you're done tensioning and stress-relieving, the spoke just after the bend will be in contact with the flange. If they aren't, the bend will flex with the cyclical loading it gets while the wheel rolls. This will fatigue the bend and cause premature failure.

__________________
Jeff Wills
All my bikes:
http://home.comcast.net/~jeff_wills/Gallery/index.html

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