EIE Wheels with Extralite SP hubs

[choochoo46]

Just received a new set of wheels from EIEcarbon.com for a lightweight build based on a Trek Emonda SLR RSL rim brake frame (which hasn't been delivered yet). It was between these wheels and the LightBicycle AR46 rims with Carbon-Ti X hubs (1354g) but I couldn't pass up the weight savings.

Specs: 45mm deep, 21mm internal rim width, 28mm external rim width.

It was estimated to be 1262g +/- 25g, but actually came in at 1212g! Not bad for a pretty deep rim.

EIE model SRG45TC28 SL, 420+/-15g, UD, Matte, 20/24H (no rim bead hole), non disc high TG resin brake (Graphene brake surface)
https://www.eiecarbon.com/goods/details/SRG45TC28
Hubs: Extralite 20/24H, 48g & 129g respectively, 11 spd
Spoke: Sapim CX-Ray spoke
Nipple: Sapim secure aluminum

I mounted them with 23mm Vittoria Corsa Speed 2.0 TLRs as I'll be using them in my next race on July 10th. I don't have my calipers handy, but when mounted they are probably 26.5 or 27mm. The tires went on by hand (almost resorted to a tire lever) and seated using my Schwalbe air blaster on the first shot.

Haven't ridden them yet. Will report back once I have some initial miles on them. Can't wait!

[Marin]

Niiiiiiiice!

[Liimis22]

Intresting
I need new wheels because my mavic's are too old for xdr freehub.
So have been looking semi lightweight tubeless rimbrake wheels with 12speed xdr hub under 1500grams
I've been thinking Mavic cosmic slr 40 and or zipp but maybe it's time for something new.
I'll wait for your report with great intrest.

[Nickldn]

Out of curiosity why choose to run 23mm Corsa Speeds on a 21mm internal width wheel, rather than a 25mm?

[choochoo46]

I'm running 23s on a 21mm inner rim because my research on 25mm Corsa Speeds indicated that they'd inflate to at least 28mm, thereby exceeding the 105% rule.

And the bonus is that they're slightly lighter and slightly more aero.

[Nickldn]

I guess we can turn the question around:

Why choose to run 21mm internal width wheels when you want to use 23mm, or 25mm tyres?

Do you not have safety concerns running a 23mm tyre stretched out to 27mm?

I thought 21mm internal width wheels were designed with 28mm tyres in mind and anything smaller was either sub-optimal, or just a plain gamble with the tyre staying on the rim?

[mag]

It's also a question of available options. There aren't really many (if any) 19/28 mm (internal/external) lighweight rims which would be optimal for 25 mm tires. If you want to go wider (28 mm external) you have no reasonable options other than 21/28.

[Nickldn]

But why would you want 19/28 mm (internal/external) wheels to run 25mm tyres? You would ideally use 28mm tyres on wheels that wide.

I have Bora WTOs which are 19/26.5mm (internal/external) and run 25mm Vittoria clinchers which come out at 26mm, which fits in with the 105% rule.

My reservation is that clinchers/tubless tyres do not benefit from an internal diameter which is nearly as wide as the tyre. In fact it may be quite risky in terms of said tyres staying on the rim in some situations. Not sure if the situation is different for hookless, but for normal hooked clinchers/tubless tyres I would worry.

[mag]

I've got 19/27 rims and with 25c IRC tires that I use most of the time it's very close to their actual width (actually tires become slightly wider at the brake track after some time). So 19/28 would fit much better.

[alcatraz]

25c tires should fit nicely on 28mm rims.

(Please don't confuse 28c with 28mm. It's not the same.)

[choochoo46]

I have Bora WTOs which are 19/26.5mm (internal/external) and run 25mm Vittoria clinchers which come out at 26mm, which fits in with the 105% rule.

Actually a tire that measures 26mm actual mounted width would need a 27.3mm rim to meet the 105% rule.

I went with the the Corsa Speed 2.0+ tires as my race tire. To meet the 105% rule with a 28mm outside rim width I needed a tire that would be 26.67mm or less when mounted.

On Bicycle Rolling Resistance, the 25mm Corsa Speeds mounted up at 27mm on a 17.8mm inner rim, so no way they'd be 26.67mm or less on my 21mm inner rim.

And yes, ideally I'd use a 19mm inner with a 28mm outer, but I could not find that configuration, especially since I was seeking a very lightweight, tubeless, climbing wheel that wouldn't break the bank.

Finally, I do have some reservations about running the 23mm tire on a 21 inner rim, but the tires seem to be doing great. Haven't ridden them except around the block because it has rained all week. They hold air very well and when I release all the air from the tires the tire stays seated on the rim -- which is a good test.

Plus I've been running 25mm GP5000s on a 23mm rim (LB AR56) for almost 2 years.

[Nickldn]

Yes you are absolutely right, 26mm actual mounted width tyres would need a 27.3mm rim to meet the 105% rule.

Apologies, silly typo, my Rubino Pros actually measure just over 25mm on my Bora WTOs, so need a 26.25mm wide rim to meet the 105% rule.

If they measured 26mm the WTOs would be too narrow. Wanted to use Corsa G+, or GP5000 next and wonder if they will come up wider than the Rubino Pros.

You are braver than me running these tyres on wide rims, but seems to be going well.

[choochoo46]

Width as measured. 23mm Vittoria Corsa Speed 2.0+ TLR

I have yet to put any miles on the EIE wheels as it continues to rain around here.

The Corsa Speed 2.0+ TLRs have been mounted for about a week and measure 25.5mm +/- 0.3mm depending where I measure them. That puts me about 1mm under the 105% max of 26.67mm.

I'll post another update once after my first decent ride with them... weather looks better for Sunday...

[choochoo46]

I now have about 100 miles on the wheels. Did a pre-race ride of my upcoming race and then did the 47 mile course again during the actual race.

They've met all my expectations and then some. I dropped 314g compared to my LightBicycle AR56s with DT350s (not including the 150g weight savings going from 25mm Conti GP5000 TLRs on the LB wheels to the 23mm Vittoria Corsa Speed 2.0+ TLRs (i.e. 300g/GP5000 tire vs. 225g/Corsa Speed tire).

On the steepest hill of the race I clocked the same time as my practice run but used an average of 9 watts less. Of course, I wasn't carrying my 128g repair kit, 100g Vario radar or 138g iPhone either.

The 45mm deep wheels ran really smooth. When climbing fast up steep grades they tend to "purr" rather than the stronger sound of the LB 56mm deep wheels. During the race I set PRs on the descents and in only 1 of the 4 descents was I drafting behind someone. And these are my local roads so I've gone down them a bunch. Of course it was in a race...

Finally, I haven't noticed any difference in engagement between the 2-pawl Extralite hubs and the 36T DT350s.

And perhaps most important the blue EIE logos work well with my blue & yellow race kit. I got a lot of positive comments about them.

EIE wheels on my Fuji Transonic 2.5 bike. 6.9kg including garmin mount & bottle cage

[Nickldn]

How was comfort/bump absorption from the 23mm Corsa Speeds compared to your 25mm tyres?

Not a primary concern during a race of course, but good to compare.