MA-2 / MA40 width

TBGibb

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Mar 2, 1998, 3:00:00 AM3/2/98

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I'm puzzled. In the latest Nashbar catalog the Mavic MA-40 is listed as
accomodating tires up to 25 mm but since Mr. Brandt likes the MA-2 (same width
in the catalog as the MA-40 and I think it's the same extrusion) and 700X28
tires and I'm using a 27X1ź (about 32 mm) on an MA-40 (sweet ignorance on my
part) are we flirting with death or is Nashbar wrong about that?

Tom Gibb <TBG...@aol.com>

Propeloton

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Mar 2, 1998, 3:00:00 AM3/2/98

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I have used 32mm tires on a MA-40(yes-a HA version of MA-2) and I have sold
32mm tires on cyclo-cross wheels that were also 32mm-no problema-
peter
propeloton

Tom MacDonald

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Mar 2, 1998, 3:00:00 AM3/2/98

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Keith Bontrager used to cut MA-40's down to 26 inch size to accommodate
fatty mountain bike tires. I would say Nashbar is very, very wrong.

Tom

John F. Henderson on is3

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Mar 2, 1998, 3:00:00 AM3/2/98

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Mavic's website sez 25, but I've used 28s with no problems, and I suspect
that 30s would work fine as well. Has anyone had any problems with 32s
(or has anyone else even tried it)?

-John Henderson

SB

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Mar 2, 1998, 3:00:00 AM3/2/98

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john F. Henderson on is3 <hend...@is3.nyu.edu> wrote in article
<6def2s$4b2$1...@news.nyu.edu>...

I use an MA-40 on the front and a Reflex on the rear. The MA-40 is 20.5mm
wide and the Reflex is 18.5mm. The tires are Avocet Cross Kevlar's
700/32's. I have 300 miles with these combinations with no problems. The
Mavic website shows maximum tire sizes for these rims, and are
understandably underated. I was very nervous about the 32 tire on an 18.5
rim until I considered my mt bike. It has Smoke 2.1 inch/52mm width tires
on a Mavic 238 rim (23mm width). I run Smokes at a tire pressure as low as
25 psi, turn hard in corners and have never blown the bead off the rim. Of
course this is just my own common sense reasoning, and I am still curious
as to whether there is more involved, such as does higher tire pressure
make the problem worse ?. I'll keep on riding it in the meantime.

SB

Sharon & Garry

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Mar 2, 1998, 3:00:00 AM3/2/98

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I use 700x32/35 on our tadem without any problems.
Garry N

Rick Denney

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Mar 2, 1998, 3:00:00 AM3/2/98

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Nashbar is just quoting the Mavic literature, and they will promote
specialization. They may also be suffering from lawyer-induced excess
conservatism.

Rick Denney
Take what you want and leave the rest.

Garry Lee

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Mar 2, 1998, 3:00:00 AM3/2/98

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I've ridden 32c Top touring on these rims for years without problems and
have ridden 37c Top TOuring as well, with no problem. When ignorance is
bliss, tis folly to be wise.

Mark Chandler

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Mar 2, 1998, 3:00:00 AM3/2/98

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On 2 Mar 1998, TBGibb wrote:

> I'm puzzled. In the latest Nashbar catalog the Mavic MA-40 is listed as
> accomodating tires up to 25 mm but since Mr. Brandt likes the MA-2 (same width
> in the catalog as the MA-40 and I think it's the same extrusion) and 700X28

> tires and I'm using a 27X1¼ (about 32 mm) on an MA-40 (sweet ignorance on my

> part) are we flirting with death or is Nashbar wrong about that?

The mail-order companies are merely re-stating what Mavic's literature states
for tire size guidelines.

I've run 700x45c tires on MA-2s w/o incident. Bruce Gordon has sold LOTS
of Rock n' Roll bikes with this combo and I've never heard of a problem
with those bikes. Mountain bikers ran cut-down (and re-rolled) MA-2/40s
with 1.9"+ tires before the "advent" of narrow mtb rims.

I don't think you're risking anything by using that tire and rim combination.

> Tom Gibb <TBG...@aol.com>

--mc

Mark Chandler Concord, CA m...@hooked.net
http://www.hooked.net/~mpc

Frank

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Mar 2, 1998, 3:00:00 AM3/2/98

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One of the bikes I have been looking at comes with MA2's but can be
upgraded to Mavic Open Pro Sup's. How much of an upgrade are the Opens
over the MA2's?

Rick Denney

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Mar 3, 1998, 3:00:00 AM3/3/98

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None at all. In fact, if you listen to Jobst, you will find that the
MA-2's are better, because they are 1.) not anodized, and 2.) not
machined. Machining makes the sidewall non-uniform (or else it has no
purpose), and is probably just done to scrape off the anodizing, which
reduces braking effectiveness. The anodizing is there to make the rim
look cool (ignore all other reasons), but, in fact, creates a brittle
skin that cracks easily and may provide a starting point for more
serious fatigue cracks. Go with the MA-2's and spend the money on
better shoes or a better saddle--that will really improve your life.

Michael Slavitch

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Mar 10, 1998, 3:00:00 AM3/10/98

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This table is from Damon Rinard's web site. Note that MA-2's actual
weight is *lighter* than the Open 4 SUP CD rims, and lighter than most
samples of the Open 4 CD rims.

Lighter. Stronger. Cheaper.

700c clinchers

BRAND, MODEL CLAIMED ACTUAL
Velocity Aerohead 398,394,395,407
Araya CT-19N 404 semi-aero, no eyelets
Matrix ISO-C II 409,392,398,405,406,411,412,440
Matrix Titan II 420
Campagnolo Ypsilon 440 426
Araya CTL-385 385 430,428
Araya VX-400 400 430
Campagnolo Omega V 440 430
Ritchey 450CE 450 437,463 Hybrid rim with eyelets
**** Mavic Open 4 CD 439,456,456,437,412,434
Araya RS-430 441,441
**** Mavic MA 2 444
Sun M14A 395 452,412
Campagnolo Omega 19 416 453,457
Nisi Mixer 459
Campagnolo Omega Strada 466 468,469 box hardox
**** Mavic Open S.U.P. CD 484,482
Campagnolo Gamma Strada 490,493 box, single eyelets, black ano
Araya PX-35 499 single wall, beveled corners
Wolber 510 box, double eyelets, hard ano
Matrix Sonic 513
Campagnolo Omicron 515,517 box, double eyelets, black ano
Matrix ISO-C 522
Rigida DP 18 596 30mm deep

--
Michael Slavitch slav...@loran.com
Loran Technologies http://www.loran.com/~slavitch
Ottawa, Ontario Un! Znqr lbh ybbx!