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19 votes

How to be certain a Boardman ADV 8.8 would fit without prior road bike experience?

This is why people recommend not going to Halfords. (For the benefit of people outside the UK, Halfords is primarily a car accessory shop, which also sells bikes). If you go to a proper bike shop, ...
David Richerby's user avatar
17 votes

Are 26'' wheels and tubes a thing of the past?

The sheer number of bikes in the world with 26" wheels means finding a tire is unlikely to be a big problem for a long time, if ever. Plenty of BSO's being sold are still 26" and there are ...
mattnz's user avatar
  • 50.9k
16 votes

Can getting a larger sized bike make the bike less aggressive?

Buy the bike that is not only the right size for you, but the right geometry. If the model is too aggressive, then look at another bike with a geometry more suited to you and your riding aspirations. ...
mattnz's user avatar
  • 50.9k
15 votes
Accepted

Can I replace 700×23C tire with 700×28?

Your rims can almost certainly take the extra width. The real question is can your frame, forks, and brakes? Only you can measure that. Based on nominal dimensions (and some approximations) you ...
Chris H's user avatar
  • 59.7k
15 votes

Why do most road bike sizes use the same wheel size?

Smaller wheels, yes. Bigger wheels, not necessarily. This is a matter of being able to build a frame that fits the rider and the wheels; any differences in rollout can be compensated for by changing ...
Adam Rice's user avatar
  • 30.1k
13 votes

How much can we change our bike wheel diameters before needing another bike fit?

The thing about bike fit is that it's almost exclusively about relating your body position to the mechanical parts of the bike. The relationship between handlebar, saddle and pedals is unaffected by ...
Chris H's user avatar
  • 59.7k
13 votes

I think I chose the wrong road bike size

Almost all road bikes have your torso leaning forward to some degree, meaning you have to hold your head up constantly. If you've never ridden a true road bike before, you've probably never had to do ...
Andrew Henle's user avatar
  • 10.6k
12 votes

50cm road bike for 5'8 height

Very unlikely a 50cm (small?) bike will fit you. I'm about the same height and fit a 54/medium in most road bike models. Some people about the same height with short legs fit a 52cm frame with a long ...
Argenti Apparatus's user avatar
12 votes
Accepted

Can I put 28" tires on 27,5" wheel?

The bead/rim diameter difference between the two sizes is 38mm (622mm - 584mm) or 1 1/2in. So no, there is no way to even fit a 28" tire on a 27.5" rim, as the bead diameter of a 28" ...
Rеnаud's user avatar
  • 20.6k
11 votes

Wheel size: 650 to 700

Sorry, that frame will not take larger wheels. Triathlon/aero bikes have minimal clearance between frame/fork and wheels which do not even allow larger tires in some cases. Additionally, bikes ...
Argenti Apparatus's user avatar
11 votes
Accepted

32-622 tire too small for 622x19 rim?

You have the correct tires. This does not have anything to do with tire width. The diameter determines whether tires will fit or not, unless there is a huge width mismatch. Rims and tires are both ...
ojs's user avatar
  • 22.1k
11 votes
Accepted

Do I need a chain breaker tool to install a new chain on my bicycle?

You need a chain tool. All drivetrains are different. The chainring size (or the big ring size if a 2x or 3x drivetrain), largest cog size, and chainstay length all influence the length of chain ...
Weiwen Ng's user avatar
  • 32.6k
11 votes

Bike too large, if I change the wheels to a smaller size will this lower the height?

There are several issues worth addressing. The frame is too big, when I stand on the bike, off the seat, my toes only just touch the ground. I'm not thinking this is safe to ride around London. When ...
Weiwen Ng's user avatar
  • 32.6k
10 votes

Tire Size Road Bike

15 is the inside width of the rim in millimeters. The tire should be wider than that so that is stays on the rim. 19 to 28 mm in the second picture sounds like a realistic range of suitable tire ...
ojs's user avatar
  • 22.1k
10 votes

Are 26'' wheels and tubes a thing of the past?

Global touring is a niche, with very specific needs. Even if the general trend is the increase of the size of the wheels, there might specific reasons for a heavy duty touring bike to prefer smaller ...
Rеnаud's user avatar
  • 20.6k
9 votes
Accepted

Shimano STI shifters: do they come in different sizes?

Yes. Shimano introduced the 3300 STI in 1999, which has a downshift lever on the hoods, and reach adjust via screw (the main models had only rubber shims to adjust reach). This continues today as ...
thelawnet's user avatar
  • 4,230
9 votes
Accepted

Would a Rockefeller custom-build a frame? (If money were no object, is a custom frame always preferable to stock)

Your hypothesis is incorrect. It's especially incorrect on frames with 2cm between different model sizes, but I'd say it's also incorrect on frames with even 4cm between sizes. Here's why. Today, bike ...
juhist's user avatar
  • 19.1k
9 votes

Can I fit 27x 1 1/4 tires on a 622x14 rim?

No, not safely. Bicycle tyre measurements are somewhat nonsensical, and plain unit conversions will not result in useful numbers - 27 1/4 inches is 692 mm which is larger than any common wheel rim. 27&...
Criggie's user avatar
  • 125k
8 votes

Tire size conversion from 700 x 23c

You're asking a question that cannot be answered. Sorry - the plethora of tyre size measuring systems means there is no good answer. Diameter could be 29 inches, it could be 28 inches, it could ...
Criggie's user avatar
  • 125k
8 votes

Which measurements are most important to consider for tall men?

Among quality aka dealer-level bikes, each model comes in a range of sizes. Wheel size in and of itself is immaterial to fit. Published weight limits are not typically contingent on frame size, i.e. ...
Nathan Knutson's user avatar
8 votes

Help to find the right tyre for my Scott ebike

There are many questions here about this topic, but: bicycle tires (mostly) all have both an official ISO designation, which is a pair of numbers "XXX-YY" where XXX is the diameter of the ...
Nathan Knutson's user avatar
8 votes

26 inch or 29 inch wheel for hybrid road bike

Honestly wheel size doesn't really matter for your use. I'm over a foot taller than you, my current main hybrid/commuter/errand bike is 29" (700C) as are my mountain bike and tourer. But I've ...
Chris H's user avatar
  • 59.7k
8 votes
Accepted

Why do the ISO/ETRTO numbers not match the English measure on my Tires?

The 44-507 and 47-507 are "ISO/ETRTO" tire sizes. The 44 and 47 are widths in millimeters, and the 507 just relates to the 24 inch diameter. So the 44 "should" be a little ...
Ted Hohl's user avatar
  • 6,357
7 votes

How to determine tire size when the sidewall label is unreadable?

Tire sizes are extremely complicated because there are so many different measurement standards. See: http://www.sheldonbrown.com/tire-sizing.html One strategy will be for you to ascertain what the ...
RoboKaren's user avatar
  • 29.2k
7 votes
Accepted

Do tubed tires fit all rims, or is there anything I should watch out for?

If it's 25 years old, it's a tubed tire. 26x2.125 is a very standard MTB tire from that era. If you get any MTB 26" tire in the 2.2 to 1.5 in range that should work just fine on your bike. For any ...
Fred the Magic Wonder Dog's user avatar
7 votes
Accepted

Can a regular diamond frame bike be packed to fit as standard airline carry-on luggage?

You are correct that bike wheels are the dealbreaker—even if you could get the frame down to carry-on size, you won't get the wheels that small (although people have tried making collapsible bike ...
Adam Rice's user avatar
  • 30.1k
7 votes

Is it safe to ride a small bike?

A bike frame that is one size too small for you is not going to be measurably less safe than the correctly sized frame. Going significantly smaller or significantly larger can affect you ability to ...
mattnz's user avatar
  • 50.9k
7 votes

Can getting a larger sized bike make the bike less aggressive?

This is actually quite commonly done in bike fitting circles but you need to be aware of the stack and reach measurements. The reason it works is that going up by one size can increase the stack ...
Noise's user avatar
  • 14.2k
7 votes

I am 182cm with an inseam length of 82cm. Will Specialized Tarmac road bike size 54 fit?

The size 56 is only 7mm shorter (reach) than the size 58. The size 54 is 15mm shorter than the 58 and – as listed on the Specialized website – comes with a 10mm shorter stem (90mm instead of 100mm) as ...
Michael's user avatar
  • 27.8k
7 votes
Accepted

Is this a long or medium cage Shimano XT 10 RD-M786-(S)GS rear derailleur?

It is a GS. By looking at the exploded view and the stock pictures, I see that the inner plate of the SGS cage has a hole in it that the GS does not have. RD-M786 EV: GS: SGS:
olliebulle's user avatar
  • 4,119

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