I certainly hope you are right, that is, that stronger “grip” does not *eo ipso* (sorry!) mean more wear. I’d like to try those e-bike pads for the lackluster (but just adequate) Paul cantis on the fixed IGH Riv clone (lackluster, probably because the levers, DA 7410, are sub-optimal; but I like those levers, so that’s that), but I *do not* want to accelerate wear on the hens’ teeth Sun Ringle EQ 21 rims.
Below, what Jobst had to say in the thread linked. I live in a desert, for heaven’s sake, but I recall being caught in a sudden downpour on my beloved Joe Starck fixed custom, this 20 or close to 30 years ago, about 5 miles from home; even very moderate braking in that very short distance left noticeable scouring lines on the rim wall. I say, thank God for disc brakes for off-road (here, dry but dusty/sandy) and wet conditions! Patrick “I hope I never, ever wear out a rim from braking” Moore ------------------------------ From: [email protected] (Jobst Brandt) Newsgroups: rec.bicycles.tech Subject: Re: When to Change the Rim? <http://groups.google.com/groups/search?as_ugroup=rec.bicycles.tech&as_uauthors=Jobst+Brandt&as_usubject=change+when+rim&as_drrb=b&as_mind=27&as_minm=4&as_miny=2000&as_maxd=29&as_maxm=4&as_maxy=2000&sitesearch=groups.google.com> Date: 28 Apr 2000 21:25:51 GMT Tom Nakashima writes: > I just purchased a new set of Mavic MA-2 rims, knowing one of these > days I'll have to replace them, plus they were at a great price. I > took a 1" mic and measured the thickness of the new rim and > compared it to my 3 year old Mavic MA-2 set that's on the bike. The > rim on my bike measures .790" in thickness, while the new rim > measures .800". Seems as though I have worn off .005" of each side > of the rim due to braking. I've been taking good care of my wheels, > making sure they're well tuned. Just not sure now thin you can wear > a rim before it becomes dangerous to ride on. Anyone have the > answer to this? Has anyone wore a rim down to beyond the safe zone? The MA-2 is 1.5mm thick in that area when new (0.060"). I have ridden them to less than 0.5mm (0.020") and do not recommend it. I think 0.5mm is the limit but in my case, I was riding in the Alps in the rain and each descent from a high pass ate another 0.1mm or so from the rim. I descended the Stelvio in the rain on the rear brake alone because I was certain that I would split the rim if I used the front brake on the hollow cheeked rim. After returning home and sectioning the rim, I discovered how correct I was in estimating the condition by the feel of running my thumb and index finger across the cusp in the rim sidewalls in the manner of a caliper. I think you have a long way to go. On Wed, Oct 22, 2025 at 11:30 AM Benz Ouyang, Sunnyvale, CA < [email protected]> wrote: > On Tuesday, October 14, 2025 at 9:22:04 PM UTC-7 Patrick Moore wrote: > > I understand your assertion, but I wonder what evidence supports it, > theoretical or empirical. Seriously, I’m not being either contentious or > finicky, just asking what seems to me to be a perfectly reasonable > question, based on the consideration that pads that grip rims more strongly > might also wear them more quickly. > > > First of all, I'll admit to not using these brake pads, so I have zero > empirical evidence one way or another. > > However, I don't know if I agree with the claim that "pads that grip rims > more strongly might also wear them more quickly". My own experience is > brake pads used in the dry doesn't wear down aluminum rims appreciably, > even with thousands of miles of use. In fact, I have wheels that have seen > tens of thousands of miles in mostly fair weather conditions with both > Campagnolo and Koolstop pads, and they don't have that concave rim wall > indicative of excessive wear (and I have an inexpensive specialized gauge > <https://www.google.com/search?q=Iwanson+gauge> for this). Rims do wear > quite a bit more when run in wet conditions, when grit comes into play, > when grit embed themselves into the (soft) brake pads; no less than Jobst > Brandt has opined on this topic <https://yarchive.net/bike/rim_wear.html>. > So maybe the biggest contributor to rim wear isn't the gripping force, but > under what conditions the wheels are used in and secondarily the type of > brake pad material? > > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/d/msgid/rbw-owners-bunch/1ae39eff-99b2-4971-85bd-38d45916a189n%40googlegroups.com > <https://groups.google.com/d/msgid/rbw-owners-bunch/1ae39eff-99b2-4971-85bd-38d45916a189n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- Patrick Moore Alburquerque, Nuevo Mexico, Etats Unis d'Amerique, Orbis Terrarum ------------------------------------------------------------------------------------------------------- Executive resumes, LinkedIn profiles, bios, letters, and other writing services ------------------------------------------------------------------------------------------------------- *When thou didst not, savage, k**now thine own meaning,* *But wouldst gabble like a** thing most brutish,* *I endowed thy purposes w**ith words that made them known.* -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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