Grinding

[SamKidney]

Absolutely perfect on a grind.

Out of interest dan, what disc do you use in your grinder? I could never seem to get a decent grind with the TNNs. And would like to know as I'm wanting to use them again

[dann2707]

A round one mate

lol, nah a disk for cutting stainless steel mate.

Edited March 17, 2011 by dann2707

[bing]

i didn`t have a cutting disc, so i used a brand spanking new grinding disc with a sharp edge.i used the bare minimum of pressure, and just lightly roughed up the surface of my rims, and the difference is epic. i run standard magura blacks on the front, and onza limes in the back. i can`t believe the difference, it locks on solid now and only need one finger rested on as opposed to 2 with a lot of force. and i`ve never done it before.

stop moaning lol and get grinding. but ferchristsakes be gentle.

[Krisboats]

Whilst being informative (past the mumbling and stuttering) the actual technique they show is one i would never recommend that people use. You only need to skim the rim to roughen up the surface, sliding it back and forth takes off far more material than is actually neccessary and i've always found these type of grinds to wear down a lot quicker.

There is a full wiki article on grinding rims here.

With further demo videos here and here.

[kaybs41282]

Cool, cheers dude

[mods]

I grind my rims about twice a year. I would be depend on how much you ride. For me hardly at all during winter and a lot in the summer.

[Zetec S]

Has anyone tried a grind with the Orange/Black magura pads? (not amazing pads I know)

I'm not that impressed to be honest, I admit is alot better than smooth rim, but I don't think I could rely on grinding the back rim with these pads (using tar like back in the day for the minuite)

[N.Wood]

Grinding is easy but i think people do have a tendency to grind their rims way too often. I mean the people saying a grind last about 4 weeks are your pads made of sandpaper and your rims of cheese or something. I ride everyday and I find a grind tends to last me at least 3 months before i notice any difference at all, and even then the grind is still good to use for another month or so before the hold really starts to go. I also find that if your pads have bedded in while your grind was good a dead grind is still fine unless you are really pushing your limits.

You ride in London though, one ride on either dusty or wet/ muddy natural and a fresh grind can be worn flat.

I regrind probably once a month or so.

[Theta2]

Unfortunately grinding rims is a technique specific to trials bikes, still a sport so small in the cycling world that most bike shops wouldnt entertain the thought of taking a grinder to the braking surface. Obviously there will be one or two shops with a resident trials rider, in my experience they are few and far between.

I work in an LBS and ours has at least 4 people who know how to grind a rim

[N.Wood]

Well there are gonna be isolated bike shops who happen to have a trials rider who works there or a big trials community. 99% of bike shops will give you an odd look and show you the door.

[bella]

i think even a worn grind is definitely better than a smooth rim .i dont think it makes a massive diffrence to the life of the rim especially in comparison to the damage caused by brake slip to yourself and your bike. if your not overly confident with a grinder take the tyre off when you do it and just wipe it with brake cleaner when youve built it back up. I would never have a smooth rim again after a grind. i re-grind every few weeks but do ride a lot and rims last ages. most of the strength comes from the inside f the rim not the tyre wall edge