The rubber attached to the rim of your wheel. Flats, changing tires, selecting tires, etc.

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Do tubeless tires offer significant benefits for a cyclocross bike?

I've been using tubeless tires with great success on my mountain bike for a year or so, and the time is here to replace the wheels on my cross bike. I was thinking of getting another pair of stan's ...
6
votes
1answer
738 views

Is there a way to estimate contact patch size given tire size plus tire volume and rider weight?

Is there a way to estimate contact patch size given tire size plus tire volume and rider weight? Specifically, I've tried to build a unicycle that maximizes contact patch for riding on soft snow. I ...
6
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1answer
4k views

Picking spare inner tube size

My daily rider is a Schwinn MTB with 26" wheels/tires. Specifically the tire size is 26x47/52. On the inner tube there's a label that reads 26 x 1.90-2.125. I'd like to purchase a few spare tubes in ...
6
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1answer
328 views

What bicycle safe anti-car road spikes exist?

I am curious if there is a technology that allows bicycles to run over it, but will destroy car tires. From my understanding, usually poles like this are placed on trails to prevent vehicles from ...
6
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2answers
4k views

Can oil/grease damage tires?

I've noticed a small puddle of light oil beneath the rear wheel of our Rohloff-equipped tandem. I'm told that a small amount of leakage is normal and I'm not worried about that. The issue is that a ...
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6answers
3k views

What is the easiest and quickest way to pump up a tyre?

I find that I need to pump up my tyres at least weekly and am looking for how to make this quick and easy. So what is the easiest and quickest method of pumping up a bike tyre? As an example, I ...
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5answers
1k views

Do we really need another bike size?

OK, this is a rhetorical question that deserves to be closed as "opinion based", but gotta ask. Why do we need to have "27.5 inch" bikes? If you dig through the specs (they don't come right out and ...
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2answers
556 views

At what slope will the best bikes keep a constant speed?

At what slope will the best bikers (in terms of aerodynamics) on the best bikes roll at a constant speed at 80 km/h on an asphalt surface on a dry day? The reason for this question is because it gives ...
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2answers
298 views

Are some tires safer than others?

I bought a Bell Road tire from Walmart. Since I haven't exactly had great luck with Walmart bicycle products, I looked up the reviews... not so great. In their defense, they are 1.375, not 1.25, but ...
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4answers
2k views

What caused diagonal cuts in the sidewalls of my tire?

I noticed some strange damage on my rear tire, where there appear to be diagonally cuts going around the entire wheel. I have no idea what might have caused this damage. I first saw it a few months ...
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2answers
514 views

MTB tires: why the extended thread on the edges?

I have tires similar to this one: My point is that the tire is quite "flat", with large knobs on the edges, unlike most MTB tires, which are round. The tires feel quite unstable on any hard surface ...
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2answers
178 views

Inner tube blows up due to rim holes

I've decided to cycle to work and got myself a new bike. When the bike arrived I inflated the tyres to 80psi (20 below recommended) using a track pump. Instantly the inner tube blew up. I thought the ...
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7answers
238 views

Why do I keep getting flats?

I only bike for pleasure and sometimes to get around. I know very little about bikes. A few months ago I got a B'Twin mountain bike. Where I live now I do not feel safe biking in the city so I only ...
5
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2answers
524 views

Is my Schrader valve spoilt?

(Tried searching this forum for this question but I couldn't find a question of the same type) Hello, I've been trying to pump my front tyre but to no avail. I could easily pump the back tyre but not ...
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4answers
610 views

What size innertube for 35mm tires? (or: get innertubes on the big side or small side?)

If you had 35mm tires (Schwalbe marathon supremes to be specific) would you get innertubes speced as 28-35mm or 35-42mm? Or whichever is cheaper?
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3answers
56k views

Can I put a road bike tyre on a mountain bike? [duplicate]

I am finding it difficult to ride a Mountain bike, I feel that it may be more comfortable to change the tyre to that of a road bike, which are thinner in size. Please advise if I can do so.
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2answers
29k views

Deformed/uneven/bumpy wheel/tire/tube, how to diagnose or repair?

My bike has a deformation in the rear wheel, almost surely not due to the rim. At some point the tire has a "valley", causing it to bump instead of rolling smoothly. I'd like to understand if I have ...
5
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3answers
890 views

When to change winter tires for bicycles

At work, we discussed when to change to winter tires for bicycles (and cars). We assumed that temperature was the key factor and I used a program (Mathematica) to check the mean temperature in ...
5
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4answers
4k views

What weather conditions are slicks suitable for?

I currently use 700x25 slicks on my commuting bike, to get the easiest ride possible. I also own: 700x28 with some tread 700x35 metal studded snow tires (Purchased last year for UK snow) ...
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4answers
3k views

Replacing 14“ x 1.95” With 14“ x 2.125”?

I have a super quick question here, my daughter (she's 5 years old) rides her bicycle extensively, to the point of the actual tire has worn clear through. I didn't think it would be this difficult, ...
5
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3answers
14k views

Significant difference between 28C and 32C tires?

I have a Schwinn Sporterra 2011. It has a 622x20 rim and the default tires are 700x38C. I'm thinking of "upgrading" to thinner tires. Now, my local cycle shop has Specialized tires that are 32C. ...
5
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1answer
471 views

Is it okay to store bike tires in unheated garage over winter?

I have a lot of spare tires for bikes. I can either store them inside my house in the basement or in the garage. I've got a lot more open space in the garage, so that's my preference. However, I live ...
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2answers
288 views

Should I be able to peel off a glued tire patch?

One of the things that I've noticed with the low-cost tube patch kit that I bought is that I'm able to catch an edge of the glued patch with my knife or fingernail and peel the patch off the tube like ...
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3answers
145 views

inner tube length size question

So I bought a used road bike from WI recently. and just a couple days ago i got a flat. I took out the tube wanting to patch but saw that it was all patched up. So i decided to just buy a new on. the ...
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3answers
35k views

How do I determine my wheel size

Would someone explain wheel sizes. If I am not mistaken, the wheels on my Trek 520 touring bike are 700C. There are no markings, and of course, no documentation of any kind. I assume 700 means 700mm, ...
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2answers
11k views

Can I convert hybrid to mountain bike. Tyres and tubes?

I have a mountain bike looking frame with wheels that currently have road tyres. The bike is classified as a hybrid. My tyres state: 28" x 1.6 (42-622) The rim: ETRTO 622 x 18 I am having ...
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3answers
8k views

Is my pressure gauge broken?

I recently got an xtech pressure gauge that reads up to 160psi. My bike is a road bike that uses presta valves on the inner tubes. Here's the gauge (the one at the bottom): http://www.moruyabicycles....
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1answer
343 views

Increasing the size of tyres on a hybrid

We are planning on doing some mountain biking in a few weeks time and we'd like to get some wider tyres for my wife's hybrid. I know there are similar questions and answers out there on this topic, ...
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3answers
159 views

Get a tubeless to seat

It takes a volume of air to seat a tubeless. Even if you lube the tire it takes a volume of air to get it to pop onto the seat. Cannot deliver that volume with my floor pump. At the shop they ...
5
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3answers
177 views

Is it worth it to buy a bike that comes with puncture resistant tires, or add them later?

Is it better to buy a bike that comes with puncture resistant tires, or get a cheaper bike that comes with worse tires and then get them replaced?
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6answers
6k views

What are the consequences of riding a bicycle tire backwards?

When putting a new tire on a bicycle, there is usually a note somewhere on the sidewall showing the direction the tire is supposed to rotate when you are on the bicycle. However, the last time I ...
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4answers
640 views

What kind of bike should I get to accomodate me?

I’m a plus sized female (about 135 kg, 295lb, 5'7") from NYC and I’m looking to get into bike riding again. I haven’t ridden a bike since I was about 12 years old and I loved it. I’m looking to ...
5
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1answer
3k views

What are pinch flats?

Also known as a snakebite or pinch cut, a pinch flat is a common term among the bicycling community for a certain type of puncture — but what exactly defines one? What causes pinch flats? What helps ...
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2answers
219 views

Is this rim safe?

The rim has a parting at the join: This is a brand new wheel, and I was wondering if this is a safe one. Could it split at the join?
5
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3answers
1k views

Rotate or replace tires

I ride a cross bike mostly on the road right now and my rear tire is wearing much faster than my front, which is to be expected. I found the following thread which I think is a similar question but ...
5
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2answers
2k views

Tyre choice for loose gravel

I have a mountain bike that I take out to a local bike trail. Currently I have some thin XC tyres and they don't seem to offer much grip when going at speed. The trail is 80% downhill and mostly loose ...
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2answers
360 views

Hole in road bike tire

This is 700x25 continental Ultra Sport II I noticed there are two holes in both tires, and wonder if this is a manufacturing fault, or simply a wear indicator?
5
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1answer
1k views

What is the lifespan of a typical road tire?

Assuming no accidents, cuts, or other major traumas, what is the useful life of a typical decent-quality (maybe a Schwalbe Marathon as reference?) road or commuting tire, measured in distance traveled ...
5
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1answer
1k views

Buying slicks for a cross bike

The whole rim/tire size thing baffles me. I have a Specialized cross bike that has DT Swiss rims (622x 14). The tires are Tracer Sport (700 x 33). I would like to get a pair of slicks for longer road ...
5
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2answers
166 views

Is my pump faulty or my tyre?

I have recently bought a Specialized women's road bike and for the last couple of weeks was borrowing my boyfriend's hand pump with no real issues. Last night I finally purchased my own (Topeak ...
5
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2answers
519 views

Riding packed limestone trails on 700x23 ties

I recently bought a Trek 2.1 and it came with 700x23 100psi tires. I do a lot of road riding, but every once in a while the packed limestone (rails-to-trails) trails are the better option. I've ridden ...
5
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2answers
255 views

Fatbike tire footprints?

I am curious if there are any empirical experiments, or theoretical computational results, comparing the "footprint" size of the various fatbike/29er/mountain bike tires? There are lots of claims ...
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2answers
1k views

Will Slick Tires Work for a Mountain Bike Ridden by a Heavier Rider?

I've owned a Trek 3500 bike (shown below) for 2.5 years now and I like it very much. My bike has the same specs as under the link. It has the XL frame size and 26" wheels with Bontrager AT-550 36-...
5
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4answers
548 views

Schwalbe Marathon Plus recurring puncture - options?

Does anyone have any experience of using puncture resistant tyres when they have been cut so badly as the object pierces the tyre right through? Being Mr. Unlucky, 2-3 months ago I managed to get a ...
5
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4answers
2k views

Mountain bike tires for rocky, steep, dirt trails?

I live in central Iowa and travel once a year to the Breck area (Breckenridge, CO) to do mountain biking. Since that is the Rocky Mountains, well they are rocky and steep. Very different terrain from ...
5
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2answers
383 views

Does high PSI or low PSI affect the life of a tire?

Is there a method to tell the life of a tire? How can you tell if a tire is going to wear down faster than another tire? I assume puncture resistant tires wear out slowly, but I'm really curious ...
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3answers
1k views

Presta valve won't let air in on a new tube

During a ride I had a flat tire and used a brand new Joe's tube with sealant. For the first time in many years of riding i was not able to pump air in. It appears that the pin inside the valve won't ...
5
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1answer
3k views

Flat tire: white liquid inside the tube

I got a flat tire, kind of a big hole in the inner tube. It was raining a lot so I walked home through the rain and water puddles, and everything got wet. Now I want to patch the inner tube, but ...
4
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3answers
978 views

Is it normal to wear out the rear tire with in a few months when using a trainer?

Early this year I attached my bicycle to a trainer, around the December time frame of 2011. The rear tire and inner tuber where shot by March of 2012. Riding about 24 Miles per week. Is this normal ...
4
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2answers
207 views

Tyres self-deflating after being in storage

I recently took an old Brompton bicycle out of storage after several years. The tyres were deflated (unsurprisingly) so I pumped up the inner tube to check for punctures. I couldn't find any obvious ...