Wheel rim size...700 vs. 27
#1
Senior Member
Thread Starter
Join Date: Dec 2007
Location: NWNJ
Posts: 3,704
Bikes: Road bike is a Carbon Bianchi C2C & Grandis (1980's), Gary Fisher Mt Bike, Trek Tandem & Mongoose SS MTB circa 1992.
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 722 Post(s)
Liked 353 Times
in
226 Posts
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.
#2
Senior Member
Join Date: Mar 2008
Posts: 8,688
Mentioned: 46 Post(s)
Tagged: 0 Thread(s)
Quoted: 1074 Post(s)
Liked 295 Times
in
222 Posts
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.
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.
#3
Senior Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,095 Times
in
741 Posts
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?
#4
Senior Member
Join Date: Sep 2007
Location: Vancouver
Posts: 1,438
Bikes: NOYB
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
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".
#5
Senior Member
Join Date: Oct 2007
Location: West Yorkshire, United Kingdom
Posts: 5,773
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 453 Post(s)
Liked 104 Times
in
87 Posts
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..
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..
#6
Senior Member
Join Date: Dec 2007
Location: columbus, ohio
Posts: 895
Bikes: Soma Saga, 1980 Schwinn Voyageur 11.8, New Albion Privateer
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 76 Post(s)
Likes: 0
Liked 9 Times
in
7 Posts
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.
#7
Señor Member
Join Date: Feb 2013
Posts: 5,065
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 648 Post(s)
Liked 291 Times
in
215 Posts
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
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
#8
Senior Member
Join Date: Jan 2013
Location: Llano Estacado
Posts: 3,702
Bikes: old clunker
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 684 Post(s)
Likes: 0
Liked 104 Times
in
82 Posts
I want to replace the old to small for me 170's cranks on my old Grandis circa 1982. How can I tell what type of BB it is? I have a great older dura ace crank I want to put on but not sure if it will fit on the current BB and then if not what thread do I need?
I am plannning to get 28mm tires and go gravel grinding.....huge amount of tire space.
I am plannning to get 28mm tires and go gravel grinding.....huge amount of tire space.
#10
Senior Member
Thread Starter
Join Date: Dec 2007
Location: NWNJ
Posts: 3,704
Bikes: Road bike is a Carbon Bianchi C2C & Grandis (1980's), Gary Fisher Mt Bike, Trek Tandem & Mongoose SS MTB circa 1992.
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 722 Post(s)
Liked 353 Times
in
226 Posts
But size does matter so I may just get the 28mm tires and find a cheap 36 holed 700c rim...
Thnaks
#11
Banned
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
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
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 .
Last edited by fietsbob; 09-17-14 at 11:28 AM.
#12
working on my sandal tan
Join Date: Aug 2011
Location: CID
Posts: 22,625
Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers), All-City Space Horse (hers)
Mentioned: 98 Post(s)
Tagged: 0 Thread(s)
Quoted: 3868 Post(s)
Liked 2,560 Times
in
1,574 Posts
Mavic Open Sports and Sun CR-18s are available in 700C/36h, not too expensive either.
#13
Senior Member
Join Date: Apr 2013
Location: Cascadia
Posts: 176
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
#14
Senior Member
Join Date: Oct 2011
Location: Normal, Illinois
Posts: 2,714
Bikes: Trek 600 ,1980Raleigh Competition G.S., 1986 Schwinn Passage, Facet Biotour 2000, Falcon San Remo 531,Schwinn Sierra, Sun Seeker tricycle recumbent,1985 Bianchi Squadra
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 33 Post(s)
Liked 12 Times
in
9 Posts
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.
#16
Really Old Senior Member
Why are you stuck on 36 spokes?
Why not 32 or 48?
Why not 32 or 48?
#17
cowboy, steel horse, etc
Join Date: Sep 2008
Location: The hot spot.
Posts: 44,799
Bikes: everywhere
Mentioned: 71 Post(s)
Tagged: 1 Thread(s)
Quoted: 12635 Post(s)
Liked 7,528 Times
in
3,989 Posts
Unless you have some Campagnolo Record hubs, for instance, then by all means get rims
#18
Banned.
Join Date: Jun 2010
Posts: 434
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 29 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
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.
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.
#19
cowboy, steel horse, etc
Join Date: Sep 2008
Location: The hot spot.
Posts: 44,799
Bikes: everywhere
Mentioned: 71 Post(s)
Tagged: 1 Thread(s)
Quoted: 12635 Post(s)
Liked 7,528 Times
in
3,989 Posts
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.
#20
Banned.
Join Date: Jun 2010
Posts: 434
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 29 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
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.
#21
Banned
Join Date: May 2009
Posts: 2,078
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 4 Times
in
4 Posts
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.
#22
Junior Member
Join Date: Apr 2013
Location: Torrance, CA
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
#23
Banned.
Join Date: Jun 2010
Posts: 434
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 29 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
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?
#25
cowboy, steel horse, etc
Join Date: Sep 2008
Location: The hot spot.
Posts: 44,799
Bikes: everywhere
Mentioned: 71 Post(s)
Tagged: 1 Thread(s)
Quoted: 12635 Post(s)
Liked 7,528 Times
in
3,989 Posts
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?
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?
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.
Last edited by LesterOfPuppets; 09-17-14 at 10:50 PM.