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Brake QR Levers?

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Brake QR Levers?

Old 01-14-14, 12:05 AM
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Brake QR Levers?

Ok, I'm not too smart so help me out here. I see a lot of people riding around with their brakes in the open position (see image). I was on a ride with a co-worker yesterday who flatted. After the flat was changed I attempted to close the lever--no go. I asked him if he had brakes and he said they were fine. What am I missing?

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Old 01-14-14, 12:15 AM
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Looks like the brakes were set up with the lever in the open position. The brakes should work fine and as long as he can get the wheel in with the tire pumped up it doesn't make a difference.
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Old 01-14-14, 12:23 AM
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Open is incorrect.
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Old 01-14-14, 12:44 AM
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How the heck would you remove the tire while inflated if it's adjusted in the open position like that?
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Old 01-14-14, 12:47 AM
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The newer style of aero rims are usually as wide as the tire that goes on them.
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Old 01-14-14, 01:07 AM
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Originally Posted by megalowmatt View Post
How the heck would you remove the tire while inflated if it's adjusted in the open position like that?
You wait until it's flat
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Old 01-14-14, 05:46 AM
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Originally Posted by Bob Dopolina View Post
Open is incorrect.
Correct
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Old 01-14-14, 06:34 AM
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I see no reason for "a lot of people" to do it, but I can see a reason for a certain subset of people to do it. If you have Campagnolo or stand alone brake levers, the brake release is at your fingertips, and not on the brake itself. Therefore (and I have personally done this when I was feeling lazy), if you wish to swap between 19 mm and 23 mm rims, you can use the lever at the brake closed for narrow, and open for wide. And honestly, once you get used to the release being at the hoods, the release on the brake itself becomes annoying. If you change a tube and forget to close the release, you have no loss of braking, and can correct it without missing a beat.

But again, very small subset.
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Old 01-14-14, 09:17 AM
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Ok, well then... You all have confirmed my suspicion--that there are a lot of people (around here at least) that are simply clueless about brake QR levers and proper adjustment.
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Old 01-14-14, 10:11 AM
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If your rims are wide enough compared to the tire such that the brake QR isn't needed, adjusting brakes properly with the QR open eliminates the possibility of having insufficient braking from forgetting to close it.

Some pros ride with the rear QR open to eliminate the possibility of brake rub from wheel and frame flex and close it when needed.

I run with a lot of pad clearance and don't need to use the QR with my wheels/tires but have leave them closed anyway.
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Old 01-14-14, 10:16 AM
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The bike in the pic appears to have carbon tubulars. If they are like mine, the brake track is essentially equal in width to the tire (both spec'd at 23mm).
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Old 01-14-14, 10:17 AM
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Meh...

Yes the brakes were set incorrectly for that specific wheelset, but now with mixes of wide and narrow rims on a lot of people's setups I find we run closed on their narrow rims (usually training rims) and open on their race (wide) rims. Tends to work well.

Yeah the wide rim thing has made the balloon tire clearance with the pads bit a bit of a historical footnote.

FWIW - the brake operates fine in both positions.
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Old 01-14-14, 10:19 AM
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Originally Posted by Looigi View Post
If your rims are wide enough compared to the tire such that the brake QR isn't needed, adjusting brakes properly with the QR open eliminates the possibility of having insufficient braking from forgetting to close it.

Some pros ride with the rear QR open to eliminate the possibility of brake rub from wheel and frame flex and close it when needed.

I run with a lot of pad clearance and don't need to use the QR with my wheels/tires but have leave them closed anyway.
Ok, that sounds reasonable.

Originally Posted by canam73 View Post
The bike in the pick appears to have carbon tubulars. If they are like mine, the brake track is essentially equal in width to the tire (both spec'd at 23mm).
Same with my aluminum clinchers - 24mm (actual) tire and brake track.
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Old 01-14-14, 10:20 AM
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Originally Posted by megalowmatt View Post
How the heck would you remove the tire while inflated if it's adjusted in the open position like that?
If you had some 23Cs on 23mm rims, you could probably get it on and off. It's probably more likely that they 19mm rims and just have a lot lever travel before pads hit the rims and then they wonder why they don't stop too well even with the lever bottomed out.
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Old 01-14-14, 10:21 AM
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Originally Posted by Psimet2001 View Post
FWIW - the brake operates fine in both positions.
Sure.
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Old 01-14-14, 10:23 AM
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Originally Posted by WhyFi View Post
If you had some 23Cs on 23mm rims, you could probably get it on and off. It's probably more likely that they 19mm rims and just have a lot lever travel before pads hit the rims and then they wonder why they don't stop too well even with the lever bottomed out.
Unless the caliper is skewed to the other side, the bike in the picture does not appear to have much travel.
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Old 01-14-14, 10:25 AM
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Originally Posted by canam73 View Post
Unless the caliper is skewed to the other side, the bike in the picture does not appear to have much travel.
Yeah, I was speaking in general terms w/r/t his statement that a lot of people in his area ride like that, not to this specific instance.
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Old 01-14-14, 10:33 AM
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I can see with narrow rims/tires that would be OK. I'm riding gp4000s 25c which are fairly wide tires and it's tight pulling the tire fully inflated with the lever open.
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Old 01-14-14, 11:17 AM
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I have accidentally left my brake QR levers open several times. Doesn't affect my braking ability at all. The brake lever itself just moves slightly more toward the handlebar drop when I squeeze the lever. It's no big deal, really.
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Old 01-14-14, 01:10 PM
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With the QR open, my brake levers bottom out on the bars before reaching full braking strength. Setup: Red levers adjusted full forward, Red calipers, Jagwire compressionless brake housings, 23mm rims, 2mm clearance between track and pad on each side with QR closed.
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Old 01-14-14, 07:44 PM
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Originally Posted by Psimet2001 View Post
Meh...

Yes the brakes were set incorrectly for that specific wheelset, but now with mixes of wide and narrow rims on a lot of people's setups I find we run closed on their narrow rims (usually training rims) and open on their race (wide) rims. Tends to work well.
This is why half the time my brake thingys are halfway open.
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Old 01-15-14, 07:54 AM
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Set them up with the QR open, then flip them down for a parking brake!
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Old 01-15-14, 01:54 PM
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Originally Posted by JReade View Post
Set them up with the QR open, then flip them down for a parking brake!
Shoot I wish my MTB with V-brakes had brakes with a QR lever that could be set up that way. Would help a ton when attaching my kid's trailer.
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Old 01-15-14, 02:00 PM
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Originally Posted by PatrickGSR94 View Post
I have accidentally left my brake QR levers open several times. Doesn't affect my braking ability at all. The brake lever itself just moves slightly more toward the handlebar drop when I squeeze the lever. It's no big deal, really.
+1

I've also flipped up my rear brake lever when the pad kept rubbing and I didn't feel like fixing it at the time, forgot about it, and it was like that for a couple weeks.
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Old 01-15-14, 02:44 PM
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When I was a Cat 5, for crits I would leave my front brake caliper open so that I wouldn't be able to accidentally lock up my front wheel if I grabbed the lever too hard.
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