Open mold wide profile carbon wheels

[pushstart]

Yishun are allowed to 125 PSI / 8,6 bars from what I read on the website ....
http://www.yishunbike.com/road_rims-132 ... brake-rims

They look great on paper , nothing more interesting from others players Light bicycle , VENN
Asymetric is nice
But they are quite expensive ...

(Snip)
ASD44C-TLR-DISC: 290usd/pair
ASD55C-TLR-DISC : 310usd/pair
The shipping cost is 90usd to Belgium with two pairs."

They seem to be very nice rims indeed. I have the 33mm model, but haven't built it up yet.

The Yishun wheels were cheaper in the end (by $30 or so) than LB's 36mm model -- and quite a bit lighter (granted, my 36mm LB rims were the slightly older model before they shaved ~20g off of the disc-only rims). But the LB are very nice rims and the hookless rim design seems very sturdy. Right now I trust the LB more for rough gravel races, but that is not a scientific opinion.

[MattN]

I know a lot of the more recent posts are regarding clinchers and tubeless, but I'm after a set of tubulars.

Looking at farsports (wheelsfar) and have the following build in mind:

50mm deep 25mm wide rim
DT350 straight pull hubs
Sapim CX-Ray spokes / SILS nipples

Works out at just under £500 gbp delivered, too good to be true?

[tomycs]

50mm farsports tubulars 25mm wide w. Cx-ray and Novatec hubs, 2.5 to 3 years old, around 460£ w. customs charge (~35£).

They are fine, unlike the Venn 50mm clinchers, I had no front wheel pulsing. Still true. Typical carbon braking. slows down fine with supplied pads, cheap blue wiggle ones, Campagnolo, Giant carbon pads, black prince. Fyi settled on the Giant as best compromise.

I don't remember the weight to the gram but ~1360-1370g so more on the +30g from what they claim, rather than the minus. Supplied Ti skewers are light but creaking will appear in abt 1yr of use. I'm happy with them, they only see abt 1k of mostly summer miles per year now and at most I think between Vittoria Pave and Conti Gatorskin they've seen maybe 5k miles in a year and with Gatorskins in winter also a fair amount of dirty Hertfordshire lanes. Brake track still fine but at less than 10k miles, it's expected.

[MattN]

Thanks for the feedback, I too would only be using them for summer rides.

[tomycs]

I do like them for shorter all out efforts (club 10, hill climb).

However for weekend riding for 70mi-100mi on carbon: I'm not slower on my 2016 38mm Farsports (23mm wide) with straightpull Dt Swiss 350 which came in at 1475g with latex tubes and Schwalbe1 tyres. I guess I should give feedback on the 38mm Farsports thread after 2years of use. For me they've been great(the 38mm). I do abt 6k miles per year on them and compared to the tubulars they are also braking better (don't know if bcs of the angled brake track or just more recent technology).

[Hexsense]

got an E-mail from Light-bicycle.
They are going to launch a new deep and wide rim next month.
It is 56mm deep, 23mm inner width and 30mm outer width. Profile are attached.
I'd jump on it immediately if i'm not in the process of about to move from rim brake bike to disc brake, hence i have to wait until i buy a new disc frame first.

[hannawald]

obvious question is... weight?

[Beaver]

Hm, my TRP 970SL open wide enough for 30mm rims, maybe I should ask about a rim brake version? But for 25mm tires the 23mm inner width is too wide, and the 30mm outer width too narrow for 28mm tires, which will boost up >31mm on that 23C rim.

[Hexsense]

Hm, my TRP 970SL open wide enough for 30mm rims, maybe I should ask about a rim brake version? But for 25mm tires the 23mm inner width is too wide, and the 30mm outer width too narrow for 28mm tires, which will boost up >31mm on that 23C rim.

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.

[cassard]

Code: Select all

Hm, my TRP 970SL open wide enough for 30mm rims, maybe I should ask about a rim brake version? But for 25mm tires the 23mm inner width is too wide, and the 30mm outer width too narrow for 28mm tires, which will boost up >31mm on that 23C rim.

no, 30mm outer and 23mm inner with a 28mm tire, the 28mm tire will come to around 31 to 32mm external when inflated.

Just take a loot at enve's 4.5 ARdisc. 25mm inner 30-31 outer and designed for 28mm specific. A pair of 28mm on it will come at around 31.5mm

[Beaver]

Hm, my TRP 970SL open wide enough for 30mm rims, maybe I should ask about a rim brake version? But for 25mm tires the 23mm inner width is too wide, and the 30mm outer width too narrow for 28mm tires, which will boost up >31mm on that 23C rim.

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?

[Beaver]

Code: Select all

Hm, my TRP 970SL open wide enough for 30mm rims, maybe I should ask about a rim brake version? But for 25mm tires the 23mm inner width is too wide, and the 30mm outer width too narrow for 28mm tires, which will boost up >31mm on that 23C rim.

no, 30mm outer and 23mm inner with a 28mm tire, the 28mm tire will come to around 31 to 32mm external when inflated.

Just take a loot at enve's 4.5 ARdisc. 25mm inner 30-31 outer and designed for 28mm specific. A pair of 28mm on it will come at around 31.5mm

As hexsense stated, it depends on the model. A 28mm 4000S II is 31mm wide on a 17C rim: https://www.bicyclerollingresistance.co ... i-23-25-28

[Svetty]

So my LB rims are in transit - now I just need spokes. I'm planning to measure the rims myself but thought I'd ask fellow WWs for their advice. LB give the following ERDs, but I'm unsure as to whether these are just the rims internal diameter or whether they including the spoke bed thickness and are thus 'real-world' ERDs?

RRU45 CO2 - 45mm depth: 550mm
RRU55CO2 - 55mm depth: 530mm
RR36CO2 - 36mm depth: 568mm

Cheers!

[Hexsense]

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.

[Beaver]

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?