Bora WTO

Everything about building wheels, glueing tubs, etc.
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itsacarr
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Joined: Fri Nov 14, 2008 4:55 am
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by itsacarr

Aren't the boras and fulcrums the same internal width. You liked the fulcrums better though?

by Weenie


jlok
Posts: 1386
Joined: Tue Jun 30, 2015 3:30 am

by jlok

itsacarr wrote:
Mon Jul 27, 2020 12:10 am
Aren't the boras and fulcrums the same internal width. You liked the fulcrums better though?
In terms of traction and comfort, yes; climbing, no as the 45 has more snap.
Rikulau V9 DB Custom < BMC TM02 < Litespeed T1sl Disc < Giant Propel Advanced SL Disc 1 < Propel Adv < TCR Adv SL Disc < KTM Revelator Sky < CAAD 12 Disc < Domane S Disc < Alize < CAAD 10

srdrmrs
Posts: 4
Joined: Mon Jun 29, 2020 9:01 am

by srdrmrs

hi to all.

ı have two bike. one of them is viewtopic.php?f=10&t=162206&p=1581038#p1581038 the other one is allez sprint.
ı would like to use a deeper wheel for my allez. ı was thinking about wto 45 , ı only use prime 50se and i did 20k with that wheels. now ı would like to go upper class..

what you suggest for me?

RedRacer
Posts: 381
Joined: Sat Jan 21, 2006 6:13 pm

by RedRacer

Currently riding Bora One 50 clincher pre-AC3 brake track with 25C tires and seriosuly considering moving to WTOs for three reasons. 1) Hoping they are even stiffer than the Boras. 2) AC3 braking 3) Maybe they will be more aero/faster. I don't plan to run tubeless.

My typical ride ratio is 100km / 1500m with most climbs being less than 10% and less than 8km in length. I weigh 82kg and punch better than I climb, therefore leaning towards the WTO 60s. Has anyone verified that they are really only ~50g heavier than the 45s?

Catagory6
Posts: 524
Joined: Thu Feb 09, 2017 2:36 am

by Catagory6

RedRacer wrote:
Tue Aug 25, 2020 12:15 am
Currently riding Bora One 50 clincher pre-AC3 brake track with 25C tires and seriosuly considering moving to WTOs for three reasons. 1) Hoping they are even stiffer than the Boras. 2) AC3 braking 3) Maybe they will be more aero/faster. I don't plan to run tubeless.

My typical ride ratio is 100km / 1500m with most climbs being less than 10% and less than 8km in length. I weigh 82kg and punch better than I climb, therefore leaning towards the WTO 60s. Has anyone verified that they are really only ~50g heavier than the 45s?
i have AC3 and regular brake track. can't tell any difference at all

kevinw
Posts: 159
Joined: Fri Jan 25, 2019 3:49 pm

by kevinw

Kristoff was back on WTOs for his tour win apparently - but the 45s rather than 60s

https://www.campagnolo.com/UK/en/CampyW ... ce_stage_1

jgpallero
Posts: 40
Joined: Fri Sep 21, 2018 7:13 pm

by jgpallero

Hello,

Anyone riding Bora WTO with 23 mm tyres? Although the inner rim measure is 19 mm Campagnolo says that the WTOs are designed also for 23 mm tyres. Also, the exterior rim measure of 26.5 mm makes the rim wider than the tyre (23 mm at 8 bar actually produces a measure of about 24 mm in Continental GP 5000), which is optimal from the aerodynamic point of view. Is it safe to use a 8 bar pressure with carbon Boras?

Finally, if someone uses 23 mm tyres with WTOs, could please upload some photos?

neeb
Posts: 680
Joined: Tue Jan 27, 2009 8:19 pm

by neeb

I'm using 23mm conti 5000 with WTO 33s - they measure almost 25mm at 90psi when fitted and look fine. Only one ride yet. Will try to post pics soon.

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pdlpsher1
Posts: 2848
Joined: Thu Jul 19, 2012 6:09 pm
Location: CO

by pdlpsher1

Running a narrow tire on a wide rim you run the risk of exposing the tire's sidewall to road debris. You might get ride-ending tire sidewall cuts.

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sfo423
Posts: 632
Joined: Fri Dec 22, 2006 6:12 pm
Location: San Francisco

by sfo423

Are the WTO 45 disc optomized for 25 or 28 tires?

jgpallero
Posts: 40
Joined: Fri Sep 21, 2018 7:13 pm

by jgpallero

sfo423 wrote:
Sat Sep 05, 2020 1:22 am
Are the WTO 45 disc optomized for 25 or 28 tires?
According to Campagnolo, "The profile of the rim, which has an internal diameter of 19 mm, corresponds perfectly with 23 mm, 25 mm and 28 mm tyres" (https://www.campagnolo.com/US/en/Wheels ... disc_brake, the same text is present in all the WTOs description)

According to Hambini, "It is vitally important to install tyres that are slightly narrower or inline with the brake track of the wheel rim", and "At speeds above 30km/h, it is more beneficial to have 23mm tyres than 25mm front tyres for aerodynamic benefit" (https://www.hambini.com/testing-to-find ... le-wheels/).

So for the WTOs, rim or disc brakes, the best choice from the aerodynamical point of view should be 23 mm or 25 mm tyres

bobones
Posts: 135
Joined: Mon Aug 12, 2013 11:19 am

by bobones

I've got a few hundred miles on my WTOs with 23 mm Corsa Speeds. No problem and they look good. I'll post a photo and measure them tomorrow, but I run them at only 5.5 bar.

neeb
Posts: 680
Joined: Tue Jan 27, 2009 8:19 pm

by neeb

Here's mine - as above, these are 23mm conti 5000s at about 6 bar - they measure practically 25mm fitted, so about 1.5mm narrower than the external rim width.

Image
Image
Image
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jgpallero
Posts: 40
Joined: Fri Sep 21, 2018 7:13 pm

by jgpallero

Thank you for the photos, @neeb. Only one detail: I think you have installed the tyres reversed. Well, Conti GP 5000 are almost slicks and I think the pattern does not play an important role, but at least the front tyre is reversed.

Other question: are the spokes in the WTOs round? They appear round in the pictures

neeb
Posts: 680
Joined: Tue Jan 27, 2009 8:19 pm

by neeb

jgpallero wrote:
Sun Sep 06, 2020 1:08 am
Thank you for the photos, @neeb. Only one detail: I think you have installed the tyres reversed. Well, Conti GP 5000 are almost slicks and I think the pattern does not play an important role, but at least the front tyre is reversed.
Yes, you're right - the front was on backwards. TBH I'd no idea (or had forgotten) that the Contis were directional, coming from Vittoria Corsas and Schwalbes.. The directional arrow is pretty subtle and only on one side. I guess those little tread patterns might be 0.5w more aero the other way around.. :D .
jgpallero wrote:
Sun Sep 06, 2020 1:08 am
Other question: are the spokes in the WTOs round? They appear round in the pictures
No, they are smoothly ovalised - unlike the bladed spokes on the older Boras. I guess that the WTO spokes are oval in cross section while the older Boras are rectangular in section.

With my calipers the WTO spokes seem to be about 1.9mm x 1.3mm.

Image
Image

by Weenie


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