Yellowbeard

Has anyone got the new 2015 Pacenti SL23 rims? The ones with the 20.3 mm internal width?

If yes, do you know how wide a Conti GP4000s in 23c measures on 'em?

Planning out a new wheelset, but I don't know if I have the fork clearance. Trawling around the web for numbers suggests that 23mm GPs may hit 27+mm actual width on rims this wide, but the only concrete comparison I can find is that tire on an Ardennes+.

rpenmanparker 

So if you can't run a 23 mm tire because it is too wide on those rims, what are you going to do? Go back to 21 mm tires, which are almost extinct? What would be the point of having the wider rims if that were the case?

dtrain

That's probably pretty close. I doubt you'll find many that actually have their hands on the newest SL23 yet.

I run Mich PR3 (23c) on my first gen SL23s...nice rims.

Yellowbeard

Then I'll buy narrower rims instead. I don't have them yet.

A standard Ardennes (23mm outside, 17.5 inside) clears my fork fine with the same tire, so the first gen Pacentis should be fine (18mm), or Velocity A23s if I find any cheap.

knobd

I'm in the market for a new wheelset and one of the guys on wheebuilders suggested these rims. I think the 27 measurement you are getting is for the 700 x 25 GP 4000s II's. I remember seeing this somewhere as it's actually a concern for me since I have the 25's. I'm pretty sure your 23's are not going to go all the way up to 27mm.

Thirstyman

I have that rim and tire combo and absolutely love it. The Conti GP 4000 II s 23mm tire measures 24mm on these rims. Remember that the rims themselves actually measure 24mm externally. These number where for the newly installed tires as measured by calipers.

Looigi

23mm Mich Pro4s measure 23mm on a traditional 19mm rim and 25mm on a Pacenti SL23. They would be even wider on a wider rim.

KBentley57

I've got the 2014 version of the SL23's FWIW, I have conti 4000s GP II's and they measure 26 mm at their widest point @ 100 psi. Measured with a digital caliper.

Yellowbeard

Thanks for the numbers guys.

Hmmm. My (worn) GP4000s is 24mm on a 15mm (internal) Shimano rim. Sticking a bunch of tape over top of that I get fork/sidewall contact at 30+mm. So if the tire hits 26 mm I'll only have 2mm of clearance on each side.

The same tire on a 17.5mm (internal) Ardennes rim hit's 25.5mm.

Might have to make do with the old model that's on sale.

bj.bonnette

My V1 Sl23's with gp4ks2's measure 26mm

I also run 24mm Sworks tires that measure 24 and the 26 measures 26.

Yellowbeard

Ordered a pair of first-gens from BHS. Going with the safer clearance and clearance price.

WhyFi

Not necessarily, if you're solely basing your conclusion off of your two data points.

Looigi

I have more data points.

WhyFi

Cool. What are they?

knobd

Ditto here as I finally got around to upgrading my R501's on my Pinarello. Last evening, I ordered some handbuilts using the 1st gen SL23's from prowheelbuilder. I went with the SL23's, DT Swiss 350's, black Sapim CX-Ray spokes (28-32), Sapim black brass nips, red skewers. Total cost/weight $637/1646g w/o skewers (free shipping until 7/1 on PWB). Being 235 lbs. this is about as light as I want to go. I read nothing but good things about these rims.

dtrain

Mine are very similar: same spokes (even the same number) and same rims, but with CK r45 hubs. they are about 70-80 grams lighter and I love 'em. On my other bike, I run your 350 hubs laced to some HED Belgium C2s. I like those too (but they don't have CX-Rays and aren't as light/responsive). I think you'll be pleased.

knobd

I contemplated the exact combo's you mentioned at some point in the past week. Came real close with matching the SL23's w/ White T11's instead.

dtrain

I got the r45s for a ridiculously good price. I don't know that I'd recommend them to anyone paying ~retail. Those t11s look nice - especially the Ti freehub body. I like the ratchet system on the 350s, but have some very serious cassette bites already. I'm curious, did you consider the new November hubs (t11 clones) with SL23s?

Muffin Man

I just ordered a set of White Industries hubs to v2 SL23, and I'm going to be putting Schwalbe One tubeless 25c on them. I'll report back when I get that set up.

knobd

How serious of an issue are the cassette bites? I still have time to change/cancel the order but I really like where I am price point wise. If I switch to a White T11/double butted spoke combo I'm still under $700 with only 10 g's added ($696/1656g) with a more durable hub.

I realize that Ultegra is out there but for once I wanted to give weight at least a little credence and wanted to stay under 1700 g. I'm going to give the November website a good look. However, I have the same concerns as the OP in this thread regarding the width of the V2 SL23's and I'm only seeing those on that site right now.

dtrain

I don't really have enough experience with alloy hub bodies to evaluate (ran Mavics for years). They appeared really quickly and have been an issue when taking the cassette off. My r45 has it too. If I'd paid retail for those, I'd be wishing I'd gone with t11 or DA 9000. I could probably live with it at the price point of the 350s. I'm otherwise happy with the 350, and found a replacement hub body for when the time comes.

Yellowbeard

My build's gonna be a low-budget 28/24 2x with the silver rims on the BHS SL210 rear and SL85w front with brass nipples, washers and Lasers. Here's hoping all silver doesn't look too cheap, but I think it'll work on my bike. Adds up to just under 1500g. Not bad for $300 US. Of course, being Canadian, I'll end up paying 50% extra by the time I get them, plus my own labour.

Now I've gotta finish building my tension meter and calibrator.