Open mold wide profile carbon wheels

Everything about building wheels, glueing tubs, etc.
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Beaver
Posts: 501
Joined: Wed Aug 18, 2004 6:06 pm
Location: Lower Saxony - Germany

by Beaver

Hexsense wrote:
Thu Apr 19, 2018 4:52 pm
Beaver wrote:
Thu Apr 19, 2018 12:18 pm
Hexsense wrote:
Thu Apr 19, 2018 12:14 am
i'm using 23c on 21mm on my front wheel.
I think 25c on 23mm will be great.
Expected tire width is only 0.7mm wider than on 21mm from my rough estimation.

Some 28c are narrower than others. Vittoria Corsa G+ 28c, for example, is not much wider than the 25c.
How does the 23mm tire feel on 21C? For some it's a bit too hard...?

I'm happy with 25mm on 21C and never tried 23mm until now. What pressure are you running at which rider weight?

And do they also plan lower versions of this rim?
23c on 21 is right at the limit where i still feel fully confident about the system. I'd only do it on big 23c like Continental and certainly not small 23c like Veloflex etc.
I use Continental Force III and Attack III which is 23c and 25c combo. Although they use the same Black Chili compound as the 4000sII as well as having same Vectran breaker, they are still thinner thus they feel softer than 4000sII so i run them a bit higher up than i used to. Front wheel pumped to 70-80 psi (depend on road i plan to ride them on). With rear wheel only 3-5 psi more because it's already mostly compensated by being 25c.

I find them good, fast, comfortable for me, 64kg rider. Cornering feel a bit strange at first compare to Pirelli Pzero Velo 25c up front especially when the tire is so new that it doesn't grip well yet. Then the tire break in and i get used to it quickly. It's certainly aero as the front tire is not wider than the rim.

I also have chances to compare test 17mm inner width and 21mm inner width rear wheel with the same tire (the 17mm inner width wheel become my spare wheel since i got the 21mm). The 17mm really need 10+ more psi to not feel squishy in hard corner. The 21mm inner width rim (wider base) really do stabilize base of the tire. So i'm a believer of wide internal width being the way forward... as long as we are sensible about tire we put on them. 23-28c on 21mm and 25-30c on 23mm sound about right for me.
I'm 70kg and run the 25mm 4000S II on 21C with 58psi front and 65psi rear. Question is, if I would notice any difference with 23C as the side walls already stand "straight". Could I go another 5psi lower or not...? 30mm on the outside would mean better aerodynamics than the 28mm I have now, but again, the difference will be in the lower one digit watt area at 45km/h - would anyone notice? ;)

by Weenie


Hexsense
Posts: 517
Joined: Wed Dec 30, 2015 12:41 am

by Hexsense

Beaver wrote:
Thu Apr 19, 2018 6:57 pm

I'm 70kg and run the 25mm 4000S II on 21C with 58psi front and 65psi rear. Question is, if I would notice any difference with 23C as the side walls already stand "straight". Could I go another 5psi lower or not...? 30mm on the outside would mean better aerodynamics than the 28mm I have now, but again, the difference will be in the lower one digit watt area at 45km/h - would anyone notice? ;)
probably not. 23mm and 21mm's difference shouldn't be anywhere as noticeable as moving from 17mm to 21mm (or 13mm to 15mm then to 17mm).
It's just another 'a bit wider, and deeper' option available. It's for people running narrow rim to upgrade to. Not really for us who already have 21mm inner width rims.

It'll be my choice when i move to disc brake for sure, though.

matty
Posts: 75
Joined: Sat May 12, 2007 1:43 pm

by matty

Just came across another supplier

http://www.eiecarbon.com/carbon-rim-road-bike/

I wonder how many make their own?

Cannonwhale
Posts: 2
Joined: Mon Apr 23, 2018 1:10 am

by Cannonwhale

Far sports have a new range of rims for sale, with substantially lower rim weights than previous generations offered.
Attachments
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Hexsense
Posts: 517
Joined: Wed Dec 30, 2015 12:41 am

by Hexsense

OUTER width is only 23mm and 25mm?
that's exactly what i wouldn't buy.

Hexsense
Posts: 517
Joined: Wed Dec 30, 2015 12:41 am

by Hexsense

Venn is finishing their 21mm internal width, 30mm external width and 77mm deep.
viewtopic.php?f=113&t=131368&start=285

So now we have pretty much a complete range of depths of (inexpensive carbon) internally and externally wide wheels .
36mm deep, 28mm external, 21mm internal Lightbicycle,
46mm deep, 28mm external, 21mm internal Lightbicycle,
50mm deep, 28mm external, 21mm internal Venn,
56mm deep, 30mm external, 23mm internal Lightbicycle, <-coming soon
77mm deep, 30mm external, 21mm internal Venn <-coming soon

AZR3
Posts: 712
Joined: Wed Sep 12, 2012 9:00 pm
Location: Az USA

by AZR3

That lightbike 56mm is pretty much spot on with what I’m looking for! Good thing I don’t need wheels now cause I’d be checking their site everyday lol

hannawald
Posts: 272
Joined: Sat Dec 17, 2016 7:28 pm

by hannawald

And do we know something about the new 56/23mm LB rims? Weight? I would be suprised if they will be less than 500g...

kyleFu
Posts: 21
Joined: Wed Sep 14, 2016 3:23 am
Contact:

by kyleFu

A supplement for wide profile wheels, Farsports is available of outer 28mm width * internal 20mm width, both with brake and Disc brake.

U shape 38*28 clincher rim, 480g/pc+/-10g
U shape 45*28 clincher rim, 500g/pc+/-10g
U shape 58*28 clincher rim, 560g/pc+/-10g

38*28 disc brake is a good option for climbing, can be 1565g/set+/-30g for wheelset with DT240 (24/24H) + cx-ray, hub is optional for upgrade to 36ratchets and 54ratchets.

hannawald
Posts: 272
Joined: Sat Dec 17, 2016 7:28 pm

by hannawald

really not being rude, i just wonder...why would you put DT240/CX Ray on wheels with such a heavy rims? Isn´t it a rim for novatec hubs and some chinese spokes? or the rim doesn´t matter that much? I don´t speek in general about chinese rims, Light Bicycle rims seems to me different league..

pushstart
Posts: 461
Joined: Sat Jun 16, 2012 3:12 am

by pushstart

Yeah, those Farsports rims are heavy compared to LB or Yishun's new asymmetric rims, and (assuming those profile pics above are for these same rims) also don't look very tubeless-friendly.

So far, I agree that LB is in a different class. My new Yishun rooms built up fine, but the spoke drillings seemed not to be angled/offset, which made some of the spoke entry angles a little greater than I should have liked. I suspect it will be just fine. Certainly no problems in first 200mi.

Marin
Posts: 3001
Joined: Wed Jan 22, 2014 11:48 am
Location: Vienna Austria

by Marin

Anyone have experience with EIE carbon? Rims are very light, claimed 460g for 60x25mm =0

User avatar
Beaver
Posts: 501
Joined: Wed Aug 18, 2004 6:06 pm
Location: Lower Saxony - Germany

by Beaver

Hexsense wrote:
Mon Apr 23, 2018 6:16 pm
Venn is finishing their 21mm internal width, 30mm external width and 77mm deep.
viewtopic.php?f=113&t=131368&start=285

So now we have pretty much a complete range of depths of (inexpensive carbon) internally and externally wide wheels .
36mm deep, 28mm external, 21mm internal Lightbicycle,
46mm deep, 28mm external, 21mm internal Lightbicycle,
50mm deep, 28mm external, 21mm internal Venn,
56mm deep, 30mm external, 23mm internal Lightbicycle, <-coming soon
77mm deep, 30mm external, 21mm internal Venn <-coming soon
The 30mm wide rims will be the first after Enve's 4.5 AR to match 25mm tires. All the others are designed around 23mm tires - and yes, the differences will be hard to notice. :D

kuniyokeiji
Posts: 10
Joined: Tue Apr 17, 2018 6:23 am

by kuniyokeiji

i think the 28 externals are made for 25mms
and 30 externals are made for 28mms

hambini
Posts: 323
Joined: Tue Nov 15, 2016 8:13 am

by hambini

Hexsense wrote:
Thu Apr 19, 2018 10:46 pm
Beaver wrote:
Thu Apr 19, 2018 6:57 pm

I'm 70kg and run the 25mm 4000S II on 21C with 58psi front and 65psi rear. Question is, if I would notice any difference with 23C as the side walls already stand "straight". Could I go another 5psi lower or not...? 30mm on the outside would mean better aerodynamics than the 28mm I have now, but again, the difference will be in the lower one digit watt area at 45km/h - would anyone notice? ;)
probably not. 23mm and 21mm's difference shouldn't be anywhere as noticeable as moving from 17mm to 21mm (or 13mm to 15mm then to 17mm).
It's just another 'a bit wider, and deeper' option available. It's for people running narrow rim to upgrade to. Not really for us who already have 21mm inner width rims.

It'll be my choice when i move to disc brake for sure, though.
I doubt you would notice an aerodynamic difference. There is only deflection at the bottom of the wheel/tyre combination and that area has favourable velocity.

What I am trying to say is the tyre holds it's profile for 95% of the circumference it's only where it comes into contact with the road that it's squished.

Hope that helps

Hambini

by Weenie


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