Wheel rim size...700 vs. 27
 

Could I put 27 inch wheels onmy 700 c bike? I need to get new rim and want larger tires 28mm for the old girl how much more space would I need for the 27in rims? I need 36 hole rims. :notamused:

27" has a bead seat diameter of 630 mm while 700c has a BSD of 622, making 27" a poor choice if you want to fit bigger tires.
You'd have to look at maybe 650B AKA 27.5" at a BSD of 589 mm(I believe), but the you run into brake reach issues for rim brakes.

A 27" rim (ISO 630) is 8 mm larger in diameter than a 700c (ISO 622) and 28 mm tires (1-1/8" in 27" parlance) will make it even larger. Do your frame and fork have the clearances for this extra diameter and can your brake shoes be moved up the needed 4 mm to align with the new rims? Why not just fit 700-28 tires to your current rims?

The frame and fork were designed around 700c wheels - there's absolutely no good reason for putting 27" on there. You'll just reduce clearance for tire and fenders, and make it difficult to get the brakes working properly. There are a far wider range of tire widths and models available in the 700c size compared to 27".

27" = dead size/format, If your frame wasn't designed for 27" wheels, they won't fit, unless you have large clearances, could cause toe overlap and other un-intended complications

You do know that the tire width has nothing to do with the diameter? with 1800+ post, would hope you have some idea of what fits..

Out of curiosity why would you want to put 27" wheels on your 700c frame? Most folks, myself included, do just the opposite to get the wide range of modern options.

related question

i have a 2012 ford focus
and i would like to run it on whale blubber
please direct me to a supplier of blubber tanks that can be retrofitted onto cars

All-over the road.

And, lots more tire choices with 700c.

I need to replace the 36 hole rim and saw far more deals on 27" rims thus I figured why not?
But size does matter so I may just get the 28mm tires and find a cheap 36 holed 700c rim...
Thnaks

you need an airtight bag to put on the roof , for the whale carcass . then as It decomposes the Methane it gives off can work .
Natural gas-propane jets in the carburator.

Or render it down to Oil , it would perhaps burn in a USSR-Russian Diesel Truck or Tank .

Mavic Open Sports and Sun CR-18s are available in 700C/36h, not too expensive either.

Good, sound strategy. You'll be happy you took the 700c approach.

Wouldn't cow manure be cheaper and more environmentally friendly, as a methane source? I believe Russian Automobiles may be able to run for a short while on the gasses from their own decomposition.

Hey if you got the beached whale laying around , you improvise..

Why are you stuck on 36 spokes?
Why not 32 or 48?

A lot of times it's cheaper to just get a replacement wheel, then you don't have to worry about spoke lengths or lacing. Just stress-relieve, tension spokes, rim tape and go.

Unless you have some Campagnolo Record hubs, for instance, then by all means get rims :)

I built a new wheel. On the first pass the spokes were too short; I couldn't figure why. So I switched to building it 3-cross instead of 4-cross. After I finished I tried to mount a 700c tire: the tire was too small: they had given me a 27-inch rim instead of a700c. They cheerfully exchanged rims (700c was on the invoice) but didn't refund the 10 hours I spent building the wheel.

A tourist traveling long distances on back roads will have an easier time finding a replacement 27-inch tire - at least that was the state of affairs 20-30 years ago. Wal-Mart has one 700c tire now, a 38, which is bigger than I like, but better than walking. Oddly they sell bicycles with 700cx25 tires.

I thought GMC Denali had 32s stock. Same with the Thruster Fixie.

You can get skinny tire bikes on their website but I've never seen any in store.

But stores in different areas stock different things.

I don't understand your comment: GMC Denali? Thruster Fixie? Are these touring bicycles I haven't heard of? Stores? I have ridden across the country (Los Angeles to NYC, Los Angeles to Washington DC, Los Angeles to Canada, Iowa to Maryland to Key West...) on minor roads, going through towns without bicycle shops. if I needed a spare tire I couldn't get a 700c back then, or anything too skinny; if I broke my pump (which I did) I couldn't find one with a Presta head back then. I switched to schrader valves and more-common tires.

The non-tourist may, reasonably, not care. I haven't toured in years and live in a city so I don't care - but if I did I'd shop the Walmart, Kmart, Western Auto..., to see what they have and switch, if possible, so I could buy replacements in Dog Biscuit, Kansas.

New 700c rims with 36 holes are definitely out there.

Ebay might have rims or wheelsets which would complement an older bike.

I have a 1988 Schwinn which can take a 27" wheel but there is no room for any but a 1" tire and I am not even sure about that. I did not do a conversion but just trial fit a wheel I had.

You could respace your frame for a more modern wheelset or maybe the wheelset could be respaced if the spacers and locknuts will allow it.

Those are Wal-Mart's most popular selling road and fixed gear bikes, respectively.

Thanks. I just buy parts at Walmart. I'd give their 700c tire a try if it would fit my rim, but it's too big. While looking I noticed that some of the bicycles advertise having 700c wheels, so I looked more closely and saw that some of them have 700c x 25 tires, but they sell only a 38 in a 700c tire. A rim that can take a 32 can probably take a 38.

If Walmart sells bicycles for which they don't sell replacement tires do they expect the buyers to stop riding them before they need a spare?

Like this:

I've never seen a 25mm tire on a bike on the floor at Walmart. They only sell bikes with tires that thin online. They also sell bike tires that thin online. I reckon they figure if you bought the bike online, you can buy the tires online.

Your market may vary and Walmart can adjust in-store availability to match a certain market. Some stores carry the fatbikes and some don't, for instance. The bike assembler at a local store wishes they could carry the fatbikes but the powers that be won't allow it.