What happens when you get a flat?

[Grog]

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.

[pardes]

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?

[Cataboo]

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)

[pardes]

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.

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.

Maybe I'll break the world record on never getting a flat. (knock on rubber composite)

[Cataboo]

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.

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.

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.

[OakLeaf]

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.

[Aggie_Ama]

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.

[sundial]

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?

Nope, I had more flats with my mtb. Teeny tiny thorns worked their way into my tire. Gah!

I have since used Stan's no tubes stuff and no more flats. Yippeeee!!

[Flybye]

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.

[malkin]

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.

[sundial]

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.

[GLC1968]

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.

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!