Touring rims

David said:

I am building a touring bike with 700 wheels and have several choices to make: Standard rims, like
the Mavic T520 Off center rims, such as the Ritchey or IRD.

My questions: Do OCRs make the wheel significantly stronger (laced into a 9 sp hub) than a
centered rim?

Has anyone on this ng used IRD rims?

One of the rims (Ritchey) doesn't have eyelets, while the other one (IRD) does. Should this be a
reason to choose the IRD rim over the Ritchey?

I will appreciate any, or at least most, responses.

From experience, I can't help you, since I've never tried a OCR, but that day is not far away.

I've just built a rear road wheel with a 9sp block on a 130 OLN and the difference in spoke tension
between the drive and non-drive side is really considerable. So much so, that I can't help but
question the strength of this wheel.

What I would like to know is, if OCR do make stronger wheels, why are they not standard rims for
rear wheels?

Is it that simple, or am I missing something obvious here?

Garry

Garry Broad said:

What I would like to know is, if OCR do make stronger wheels, why are they not standard rims for
rear wheels?

Because they're expensive and they're not the same as for the front, so at a stroke you double the
inventory necessary of rims. And then, of course, there's an issue of whether or not it's actually
a really big problem. Possibly even a problem that could be better served by slightly more
eccentric spoke designs than by an OCR. Personally, I'd try halfradial first, just because I wanna
see what happens.

Jasper

David-<< I am building a touring bike with 700 wheels and have several choices to make: Standard
rims, like the Mavic T520 Off center rims, such as the Ritchey or IRD. >><BR><BR>

Problem with the OCR rims are that they are really light. The 'offcentered-ness' doesn't make up for
lack of weight, on a touring bike, IMO.

Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
(303)440-3535 vecchios.comvecchios.comOpen ↗ "Ruote convenzionali costruite eccezionalmente bene"

Garry-<< I've just built a rear road wheel with a 9sp block on a 130 OLN and the difference in spoke
tension between the drive and non-drive side is really considerable. So much so, that I can't help
but question the strength of this wheel.

What I would like to know is, if OCR do make stronger wheels, why are they not standard rims for
rear wheels? >><BR><BR>

More expensive to make is the reason. Even more to make them with eyelets.

If the 130mm wheel you built is tensioned properly, then it should be fine and dandy. Guys like me
and others have been building 130mm casette wheels for over a decade w/o problems.

Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
(303)440-3535 vecchios.comvecchios.comOpen ↗ "Ruote convenzionali costruite eccezionalmente bene"

Garry Broad said:

What I would like to know is, if OCR do make stronger wheels, why are they not standard rims for
rear wheels?

Because for most purposes standard rims are strong enough.

--

David L. Johnson

__o | If all economists were laid end to end, they would not reach a _`\(,_ | conclusion. --
George Bernard Shaw (_)/ (_) |

"David" <[email hidden]> wrote in message "]news:[email hidden]...

Quoted message said:

I am building a touring bike with 700 wheels and have several choices to make: Standard rims, like
the Mavic T520 Off center rims, such as the Ritchey or IRD.

My questions: Do OCRs make the wheel significantly stronger (laced into a

9

Quoted message said:

sp hub) than a centered rim?

Has anyone on this ng used IRD rims?

One of the rims (Ritchey) doesn't have eyelets, while the other one (IRD) does. Should this be a
reason to choose the IRD rim over the Ritchey?

I will appreciate any, or at least most, responses.

--
David

Check out the 700C Trekking rims at URLs: ritcheylogic.comtrcataloghome.htmOpen ↗
ritcheylogic.comrims.pdfOpen ↗ Pro Trekking have eyelets but only 32 holes. Also
see the Bontrager Fairlane OSB at URL: bontrager.comdetail.aspOpen ↗
Rivendell carries them in 36 hole version. See URL: rivbike.com18094.htmlOpen ↗

I have built T520 and T519s. They are very strong rims and can handle a large load. I have also
built the Bontrager Fairlane OSB. They are not as well finished as Mavic rims, but they build up
very true. I think the Bontrager Fairlane OSB will be as durable as the Mavic T520 if not more so.
The Bontrager Fairlane OSB is less expensive than the Mavic T520. The Bontrager Fairlane OSB is
specified at 560 grams. The Mavic T520 is specified at 565 grams. David Ornee, Western Springs, IL

gee, good stuff. noone mentioned the Sun CR-18(27"😉 or the brother 700-both double wall. I ran mine
into an antique storm drain grate(one of three extant) hotdogging thru town after but a weeks
running straight and tru. took a real blow, down and in to the fini at grate's end. trued it
yesterday and beyond the point where i'm a grade c wheel builder that is the wheeels are round but i
haven't got the... the sun came true from the 3/16th's by six inch dent put in at 10 mph with 160
pound rider and 25 pounds rear rack gear on 14/36 spokes. that is after a visit to the Hozan first.
no what the devil is an OCR?

In article said:

gee, good stuff. noone mentioned the Sun CR-18(27"😉 or the brother 700-both double wall. I ran
mine into an antique storm drain grate(one of three extant) hotdogging thru town after but a weeks
running straight and tru. took a real blow, down and in to the fini at grate's end. trued it
yesterday and beyond the point where i'm a grade c wheel builder that is the wheeels are round but
i haven't got the... the sun came true from the 3/16th's by six inch dent put in at 10 mph with
160 pound rider and 25 pounds rear rack gear on 14/36 spokes. that is after a visit to the Hozan
first. no what the devil is an OCR?

And just recently, a wheelset with CR-18 rims could be bought for about $70, with skewers!

Matt Temple

what about using different gauge spokes on the drive and non drive sidesto help equalize tension?
This could be done pretty easily with any rim. Just buy different spokes for left and right. I'm
feeling a little dimwited though so I can't figure out which side the thin spokes should go.....

"remove the polite word to reply" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

what about using different gauge spokes on the drive and non drive sidesto help equalize tension?
This could be done pretty easily with any rim. Just buy different spokes for left and right. I'm
feeling a little dimwited though so I can't figure out which side the thin spokes should go.....

The difference in tension determines the amount of dish, which centers the rim. Thinner spokes can
be used on the left because the tension is lower. Thinner spokes are more elastic, which causes less
change in tension as the rim deflects under load.