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I've never gotten a flat tire while riding. What happens -- does the bike become hard to control, like a car? Can you tell immediately, or is it more often a gradual thing?
I do know how to fix a flat; just don't know much about how they usually happen.
Pam
I usually luck out. I would go to work and find out my tire is flat at the end of the day. Usually I would find a piece of glass or rose thorn stuck in it. It's a slow leak for me.
I've only had 2 on road flats, so I've been very lucky. Both times, I heard the hiss, then felt the tire deflate. I've never had a blow out.
I've never heard a hiss, but other things clue me in. My rear flat today felt like thud thud thud or kathunk kathunk kathunk. I usually notice front flats by the change in sound and by the feel of the bike and/or loss of handling. I don't typically get the thud thud thud effect on the front.
When I took my new bike out on her maiden voyage a couple weeks ago, I didn't notice my front flat until it was really flat. I was attributing the strange handling to the new bike. Ummm, duh...it took nearly crashing on a corner to realize what was going on!
Every flat is pretty unique. I've had one blow out (inside the house, though, with my ears really close to the tire - ouch!), a number of slow leaks, and a few "PPsssshhhhhhhhhit" flats that deflate instantly.
Slow leaks: Usually I detect them as I ride but I remain in denial for a while. As you're riding you feel that you're slowing down, that power is not quite transferred as well, and when you take a bump you can definitely feel that tire to be more cushy (usually a back-wheel thing for me). Park the bike, run upstairs for dinner. Next morning, get to the basement... tire is flat.
Fast flats: I have often distinctly heard them as they happened, but not always. Unless it's your front wheel AND you are going downhill pretty fast, it shouldn't be an issue. Sometimes if I think I've had a flat tire but it's not 100% obvious I'll brake gently. It really doesn't feel normal and that means I have to stop and actually look at the tire as it finishes deflating. It's sort of wobbly I think, can't really describe.
I've had a shard of metal totally tear the sidewall of a tire, beyond repair. :( It was not a blowout though, but I definitely felt it immediately in the handling of a bike. (I think it was a front tire thing.)
So basically it varies.
Do flats happen less often with mountain bikes with larger wheels? Please, say yes. I have green goo in my tires, does that really help slow down the flattening process?
Pardes, if you're not mountain biking - I think flats happen less often with mountain bike tires with larger tires. If you're mountain biking, there's thorns and rocks and the rest of that to cause flats.
When I first started road biking I got a fair number of flats - I think maybe I was getting pinch flats, because I wasn't pumping up my tires every time I rode and I was only inflating up to 90 psi or something. I keep mine at 110-115 psi now and inflate them everytime I ride, so I haven't had many flats since.
I've had maybe 3 instant flats - one when I hit a pothole in a tunnel at the bottom of a hill (it was dark underneath and the road was pretty bad, so I couldn't avoid all potholes).
The bike got really noisy and I got off to see what was wrong - I don't remember it being hard to control.
I got one on a long steep down hill on a really rough section of a closed road - I noticed the bike was really noisy, and it was really bumpy, but the bike wasn't hard to control. I think it was the front wheel as well.
I've had a slow leak where I pump up the tire to whatever, the next day go out to ride and it's flat, then pump it up to 110 again, and I think I did that for a week or two before it went flat on me as I was riding it one day. (In the future I should just change the tire when that first starts happening)
That's good to know! I've never had a flat on any mountain bike (I'm always on roads or clean paths.) And now that I have a 700X32 mildly-ribbed tire on the Trek (also pumped full of Green Goo), hopefully I'll never get one the Trek either.Quote:
Originally Posted by Catriona
Maybe I'll break the world record on never getting a flat. (knock on rubber composite)
The trick to that is to stock up on innertubes.Quote:
Originally Posted by pardes
The first couple months of heavy riding, I think the BF & I went through about 14 innertubes together.
So I bulk ordered something like 36 innertubes of various sizes (mountain bike, long stem road, short stem road)
And of course since I've done that, I've not had a single flat.
A sudden front tire deflation (blowout or pinch flat) can make the bike hard to control. But that's never happened to me (touch wood). Usually with a punctured road tire, sometimes you'll hear the hiss of escaping air - depending on the ambient noise and how quickly the tire goes flat. Then you just feel the road very...directly. When you're riding on a 110# tire it doesn't feel like it's giving you much cushioning, but when it goes flat you realize that it was smoothing out the road quite a bit.
I've only ever gotten slow leaks on my fat-tire commuter. I think the tires are so much heavier that by the time something works its way through the tube it can only make a very small hole, and of course with the lower pressure, air doesn't get forced out as quickly.
A blowout may cause you to lose control. I have had two but neither were to the point that I felt like I was in danger. One was at a high speed but it was a huge shoulder and my heavy commuter bike. Much better on a bike than the two I have had in a car! I wouldn't lose any sleep over what will happen if you have a flat but I would practice changing them. ;)
That has not been my experience with the fat knobby tires on our baby trailer ... it gets flats all the time! But my theory is that it is because it comes closer to the edge of the trail, where thorns are more likely to have gotten onto the pavement, and because if I have to pull off the side (as I do, often, to hand somebody a dropped sippy cup) the trailer wheels go a bit further off onto the shoulder.Quote:
Pardes, if you're not mountain biking - I think flats happen less often with mountain bike tires with larger tires.
But I have had one flat on my road bike ever, riding mostly on the same trail where we use the trailer, so I don't really have a sense that the fat knobbies flat less. Pretty much the opposite.
We're going to put liners in those tires. In fact, I need to nag my husband to do that.
While I went 4 years without a flat, my luck ran out with a big blowout on a group ride in the middle of rural Maryland a few years ago. The tire was blown, so someone in the group had to ride back to his car to pick me up. I did not carry and extra tire with me, just a couple of tubes.
I've had gradual flats, too. The best thing you can do is pump your tires to the proper pressure before every ride. That will decrease the likelihood of getting pinch flats, which result from too little air.
Except for blowouts, which you cannot miss, you might feel like you're dragging something, or that your legs are really heavy.
Practice changing flats in your house; you'll be glad you did when you do get one on the road.
Sometimes my legs feel really heavy. I think my tire is flat. I can FEEL it!
I step off my bike to check my tires. Pinch each hard between my thumb and middle finger.
They are not flat at all. I'm just weak and tired.
When you've got a flat on a clincher wheel, it's best to bring the bike to a stop without using the brake on the flat wheel. Using the brake will slow the wheel, but not necessarily the tire, ie the tire may start precessing around the rim. In that case, the brake isn't really slowing you down, but it may have very unpleasant effects on the tire and tube. The valve could be stripped off the tube. In extreme cases, the tire and/or tube could come off the rim and wrap around the hub or frame. We occasionally see a bike like this in the shop, usually an MTB. If you've got a flat, don't keep riding on it, but don't panic brake. Instead, brake gradually to a stop and change the tube.
For mountain biking, in addition to thorns etc, you can also pinch flat - which is basically smacking something so hard it allows the tube to get pinched in between the rim and the tire.
Slime is supposed to be very useful in areas with lots of goat head thorns. I don't use it myself.
Another way to get flats is if your tire is old and stretched out a bit. I had one bike where the tire would shift ever so slightly on the rim, tearing the stem out. I had to get about a dozen flats like this before I figured out I needed to replace the tire and not the tube.
When I've flatted, I've always known right away.
I've had many flats living in the "land of the goatheads." And as everybody has said it's rather gradual. Last summer on the Oregon Bike Ride I had a blow out where the tire blew apart in an L shape. The sound was so loud that I thought somebody had shot a gun. I screamed. A man riding beside me said, "Have you got a spare tube?" When I glanced back I said, "A tube won't do any good here!" I slowly braked. No problem, but I had to be SAGGED in. (It was sooo hot; I was glad!):)
Mostly 4-letter words and in a quantity directly proportional to the lateness, cold, or darkness factors.Quote:
Originally Posted by PamNY
:rolleyes:
Thank goodness I have that skill already. My Coleman lantern has refused to pressurize on my last two camping trips so I have practiced cold/dark related epithets.Quote:
Originally Posted by withm
Thanks everyone for the interesting and informative discussion, btw.
Pam
Nope, I had more flats with my mtb. Teeny tiny thorns worked their way into my tire. Gah!Quote:
Originally Posted by pardes
I have since used Stan's no tubes stuff and no more flats. Yippeeee!!
In my experience, you turn a corner and because the front wheel does not have enough air in it to corner well, crash. In front of spectators. Who you know. :eek:
I had a BANG tire on a busy street downtown. It was frightening, but I think time did that big slow down, and I did manage to both stop and get my feet unclicked out of the pedals. I was all shakey changing the tube.
Right after that I had 3 flats in the next 3 rides, so I got'em gooped and haven't had a flat since, like July or August.
I had a road tire blow and it sounded like gun fire. I hitched a ride with a fellow back to the car. He was very respectful. ;)
My husband put new tires on one of his bikes, pumped them up, and then left the bike propped against the fireplace in the living room while we did something else. First the front tire blew - scared the ever loving daylight out of me. Hurt my ears, scared the cat half to death...ugh! About 5 minutes later, the rear tire blew! Crap tubes inflated too much or poorly installed. :rolleyes:
I've had quite a few flats, but only three while I was actually on the bike.
The first one was a fast leak but it didn't actually blow. I was just exiting the parking lot on my way home, so I wasn't going very fast. I hit something that I heard fly off to the side (it sounded metal) and immediately lost all air in my front tire in a big *whoosh*. I came to an almost immediate stop without breaking, so had I been going fast, it would not have been pretty.
My second one was also a front tire flat but it was a slow leak that I had no idea had happened until I tried to turn into a rest stop and could not effectively steer the bike. Even then, it wasn't completely flat, either.
The last one just happened about 2 months ago. I was on my commute home, drafting off DH. He was NOT pointing out debris and when he swerved to avoid a piece of glass, I had no warning and ran right over it. My front tire survived but the back one blew. Air went out immediately and in an effort to avoid biking into a storm grate, I almost crashed. I was able to hop off before either I or the bike hit the ground though. I had a hole in my tire about the size of a chocolate chip! I had to use a folded up piece of paper to keep the new tube from bulging out of it long enough to make it home. What was appropriate was that the paper I used was the registration to the car that I'd just sold since I was commuting by bike often enough to not need it!
I've had 3 - 2 on one ride on my recent trip to san diego. The first was a front tire - I didn't hear anything, was on flat ground and the handling started to feel weird. Fortunately, I was pulling into my subdivision.
When I went to ride Coronado on our vacation, I got off the trolley to find my front tire flat. I couldn't find a leak, put the tube back in and off I went. It's still holding. Number 2 was in front of the naval air station. I heard my rear tire go whoosh, and stopped. I was, of course, running for the ferry, into a head wind. For the first time, my Bike Friday cooperated and I was able to get the tire changed. As best I can tell, the valve stem failed (it was leaking air whether open or closed) - very strange. I always pack 2 tubes - I didn't ever thing I'd come that close to running out:)
CA
LOL This strange phenomenon happens to me as well!Quote:
Originally Posted by Grog