Poor Man's CLX50 disc?

Everything about building wheels, glueing tubs, etc.
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sfo423
Posts: 441
Joined: Fri Dec 22, 2006 6:12 pm
Location: San Francisco

by sfo423

I demoed the new Tarmac disc; great bike but geo wont work for me. But, I thought the wheels were fantastic for my type of geography / riding. They climbed well, rolled (and rolled), stiff (but not too stiff). They felt shallower than a 50.

Question; if I were to try and replicate that wheel in terms of width, weight, etc, what rim would do the trick? I know we are dealing w/DT hubs and spokes, but need help with rim. I could be comfortable dropping to a 45mm. The bike I am looking at will max out at 28mm tires so I need to be careful of rim ID.

spdntrxi
Posts: 2043
Joined: Sat Jul 20, 2013 6:11 pm

by spdntrxi

get CL50

by Weenie


kofsw4
Posts: 24
Joined: Wed Sep 20, 2017 10:28 pm

by kofsw4

If they'll fit then the Light Bicycle 46mm deep, 21mm internal, 28mm external rims, DT Swiss 240s hubs. Mine came in at 1435g for just under half the price of the clx50 disc and have been fantastic all rounders even in current windy UK conditions.

sfo423
Posts: 441
Joined: Fri Dec 22, 2006 6:12 pm
Location: San Francisco

by sfo423

I might be screwed on this one; the Altum disc has clearance for 28mm tires. So, max rim width should be in the 25mm range? No so sure how to figure this one out. Good to figure out before buying (or not).

spdntrxi
Posts: 2043
Joined: Sat Jul 20, 2013 6:11 pm

by spdntrxi

sfo423 wrote:
Sat Nov 10, 2018 4:18 pm
I might be screwed on this one; the Altum disc has clearance for 28mm tires. So, max rim width should be in the 25mm range? No so sure how to figure this one out. Good to figure out before buying (or not).
look for the narrow portions on the frame...probably atleast 36mm if designed for 28. The height is the tricky part to figure out under the fork crown and how the tires will deform.

TheKaiser
Posts: 548
Joined: Thu Sep 05, 2013 3:29 pm

by TheKaiser

sfo423 wrote:
Sat Nov 10, 2018 4:18 pm
I might be screwed on this one; the Altum disc has clearance for 28mm tires. So, max rim width should be in the 25mm range? No so sure how to figure this one out. Good to figure out before buying (or not).
Not sure if I totally understand what your concern, but remember that the outer width of the rim is only a concern for brake pad clearance (on rim brake bikes) and frame clearance, not tire fit (other than aerodynamics, and in that case wider is better with the rim ideally being equal to or wider than the tire). So in other words, your 25mm figure (which I assume is in reference to the outer width), is irrelevant in regard to tires. The inner width is the figure that will determine tire fit.

If your bike has clearance for 28mm tires (measured width not stated width), and you want to run the widest rubber you can, then I'd get those Light Bicycle rims referenced above, and put on tires that measure out to 28mm on them. Where it gets tricky is that many tires (like Contis) run big, so you would find a 25mm (stated size) tire would actually probably measure out to 28ish on those rims.

I hope that makes sense, and I haven't just confused you more.

sfo423
Posts: 441
Joined: Fri Dec 22, 2006 6:12 pm
Location: San Francisco

by sfo423

Thanks, that makes sense. I guess I don't really know how the manu measures for 28mm tire clearance. I'd assume they would simply say 'you have clearance for a measured 28mm tire assuming rim ID of X.'

A 28mm tire would be taller, wider, shorter, etc on different ID rims.


TheKaiser wrote:
Sat Nov 10, 2018 9:01 pm
sfo423 wrote:
Sat Nov 10, 2018 4:18 pm
I might be screwed on this one; the Altum disc has clearance for 28mm tires. So, max rim width should be in the 25mm range? No so sure how to figure this one out. Good to figure out before buying (or not).
Not sure if I totally understand what your concern, but remember that the outer width of the rim is only a concern for brake pad clearance (on rim brake bikes) and frame clearance, not tire fit (other than aerodynamics, and in that case wider is better with the rim ideally being equal to or wider than the tire). So in other words, your 25mm figure (which I assume is in reference to the outer width), is irrelevant in regard to tires. The inner width is the figure that will determine tire fit.

If your bike has clearance for 28mm tires (measured width not stated width), and you want to run the widest rubber you can, then I'd get those Light Bicycle rims referenced above, and put on tires that measure out to 28mm on them. Where it gets tricky is that many tires (like Contis) run big, so you would find a 25mm (stated size) tire would actually probably measure out to 28ish on those rims.

I hope that makes sense, and I haven't just confused you more.

AJS914
Posts: 2479
Joined: Tue Jan 28, 2014 6:52 pm

by AJS914

sfo423 wrote:
Sat Nov 10, 2018 12:22 am
Question; if I were to try and replicate that wheel in terms of width, weight, etc, what rim would do the trick? I know we are dealing w/DT hubs and spokes, but need help with rim. I could be comfortable dropping to a 45mm. The bike I am looking at will max out at 28mm tires so I need to be careful of rim ID.
It seems like the poor man's CLX50 would be a LightBicycle or Farsports wheel with DT hubs. Or, Chinese hubs is you are really poor. :D

Farsports 45mm x 28mm wide:

https://www.aliexpress.com/store/produc ... 2ec6AthGfI

LightBicycle 45mm - 25mm brake track - wider in the middle:

https://www.lightbicycle.com/U-shape-45 ... tible.html

Farsports also sells that rim in a 58mm and LB has a 55mm. Farsports also sells their 50mm wheels in 25mm wide (18mm internal).

sfo423
Posts: 441
Joined: Fri Dec 22, 2006 6:12 pm
Location: San Francisco

by sfo423

These look interesting at 1530g. No listed ID though.

http://fse.bike/product/evo-55ctd-clinc ... -wheelset/

The LB 55mm wheel w/240s comes in at 1586g and is ~$500 cheaper w/better hubs.

https://www.lightbicycle.com/U-shape-55 ... tible.html

I am not seeing many rims that will get me closer to the CLX weight (~1415g).

TheKaiser
Posts: 548
Joined: Thu Sep 05, 2013 3:29 pm

by TheKaiser

sfo423 wrote:
Sun Nov 11, 2018 12:08 am
These look interesting at 1530g. No listed ID though.

http://fse.bike/product/evo-55ctd-clinc ... -wheelset/

The LB 55mm wheel w/240s comes in at 1586g and is ~$500 cheaper w/better hubs.

https://www.lightbicycle.com/U-shape-55 ... tible.html

I am not seeing many rims that will get me closer to the CLX weight (~1415g).
I'd been looking at the LB 28mm wide U-shape 46mm rims previously, but was recently informed of these new ones in the "Open Mold Wide Profile" rim thread and am thinking about getting them myself. Dimensionally they are the most similar of the LB rims to the CLX50 (the LBs are ever so slightly wider), and they are actually 30 grams per pair lighter than the ones you linked to above to boot! That gets you down to the same weight range as the FSE set you mentioned (if you spec them 24/28 hole with 240 hubs) despite these being substantially wider. I am not sure if they come up in searches on the LB site yet, I just linked to them directly from the other thread. LB seems kind of slow with updating their site as they get new product. I frequently find out about new models both for Road and MTB from discussion threads when I would have had no idea they existed searching for them myself.

Here are the rims themselves: https://www.lightbicycle.com/Road-bicyc ... lable.html
And here is the wheelset: https://www.lightbicycle.com/700C-V-sha ... tible.html

by Weenie


sfo423
Posts: 441
Joined: Fri Dec 22, 2006 6:12 pm
Location: San Francisco

by sfo423

Nice find.

24/24 w/DT240 is claimed 1526g @ $1124.

I am surprised these don't come in 20h option considering the depth. I think 20/24 would be ideal for my weight.



TheKaiser wrote:
Sun Nov 11, 2018 12:40 am
sfo423 wrote:
Sun Nov 11, 2018 12:08 am
These look interesting at 1530g. No listed ID though.

http://fse.bike/product/evo-55ctd-clinc ... -wheelset/

The LB 55mm wheel w/240s comes in at 1586g and is ~$500 cheaper w/better hubs.

https://www.lightbicycle.com/U-shape-55 ... tible.html

I am not seeing many rims that will get me closer to the CLX weight (~1415g).
I'd been looking at the LB 28mm wide U-shape 46mm rims previously, but was recently informed of these new ones in the "Open Mold Wide Profile" rim thread and am thinking about getting them myself. Dimensionally they are the most similar of the LB rims to the CLX50 (the LBs are ever so slightly wider), and they are actually 30 grams per pair lighter than the ones you linked to above to boot! That gets you down to the same weight range as the FSE set you mentioned (if you spec them 24/28 hole with 240 hubs) despite these being substantially wider. I am not sure if they come up in searches on the LB site yet, I just linked to them directly from the other thread. LB seems kind of slow with updating their site as they get new product. I frequently find out about new models both for Road and MTB from discussion threads when I would have had no idea they existed searching for them myself.

Here are the rims themselves: https://www.lightbicycle.com/Road-bicyc ... lable.html
And here is the wheelset: https://www.lightbicycle.com/700C-V-sha ... tible.html

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