Re: Maintenance Manuals



jim beam wrote:
Peter Cole wrote:

It would be interesting to know what the actual tension would be if the quoted procedure was followed for the kind of rim described. As far as I know, no one has reported that.

to avoid pretzel? what's the point?

I'm not sure what you're trying to say. Jobst infers that following his alternate procedure will result in a spoke tension of around 100kg.

longevity depends on avoiding rim cracking and fatigue, and the manufacturer has reported that already. increasing tension doesn't increase strength so there's no point seeking more of it.

Mavic (and most others I presume) spec a min and max. I haven't seen anyone (including Jobst) recommending using more than the max spec. So what's the problem?

You seem to be sure that Jobst's alternate method will produce higher than max spec spoke tensions. How do you know that?

I've used lots of wheels, Mavic & others, the only cracking I ever got was with Mavic Reflex rims (2). I don't know what tension they were built to, I don't think it was very high, they had to be Locktited. All of my other rims just wore out on the brake track.
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Relevant Pages

  • Re: rim to replace ma2 36 700
    ... Jobst likes MA2 rims ... about disregarding a rim manufacturers spoke tension spec, ... Pointing out that the spoke tension limits on Mavic rims are relatively ...
    (rec.bicycles.tech)
  • Re: Maintenance Manuals
    ... a rim stiff enough to take double spoke tension before buckling isn't going to make rims last very long when it comes to cracking. ... hence, if you check manufacturer tension figures for rims with different spoke counts, you'll find the same tension spec regardless of count. ...
    (rec.bicycles.tech)
  • Re: Maintenance Manuals
    ... the quoted procedure was followed for the kind of rim described. ... Jobst infers that following his alternate procedure will result in a spoke tension of around 100kg. ... I haven't seen anyone recommending using more than the max spec. ... a rim stiff enough to take double spoke tension before buckling isn't going to make rims last very long when it comes to cracking. ...
    (rec.bicycles.tech)
  • Re: Wheels for 700lb guy?
    ... to the manufacturer's spoke tension spec. ... Funny that it only seems to be a reliability issue with Mavic rims, ... strength does /not/ increase with increasing spoke tension. ... the same point load as if by excess load. ...
    (rec.bicycles.tech)
  • Re: Wheels for 700lb guy?
    ... Cracks around the spoke holes sounds like excessive spoke tension. ... corniest rims I have ever used never did that. ... The body of field evidence is overwhelming-- Mavics are crack-prone. ...
    (rec.bicycles.tech)