Thinking about changing wheel sizes.
#26
Senior Member
Thread Starter
Join Date: Jan 2014
Location: Pensacola FL
Posts: 129
Bikes: 1984 Raleigh Kodiak , KHS Sierra Something
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
27x1-3/8 is the stock size for this bike. It is currently running 27x1-1/4. When I measure for tire width on the frame and forks should I drop down 2 to 4 mm to guesstimate where the wide point on a 700c would wind up? How much clearance minimum between tire sidewall and frame/fork?
#27
Senior Member
Join Date: Jun 2006
Posts: 20,305
Mentioned: 130 Post(s)
Tagged: 0 Thread(s)
Quoted: 3464 Post(s)
Liked 2,831 Times
in
1,997 Posts
27x1-3/8 is the stock size for this bike. It is currently running 27x1-1/4. When I measure for tire width on the frame and forks should I drop down 2 to 4 mm to guesstimate where the wide point on a 700c would wind up? How much clearance minimum between tire sidewall and frame/fork?
As to the amount of side clearance, you can also possibly slide the rear wheel back a bit after to gain more capacity. 4 mm on each side I would be comfortable with. You might mark the widest tire region at the chain stays now, move back 4 mm and remove the wheel, measure the inside width, subtract 8 mm and you would have a reasonable guess as to the width of tire you could run with a 700c.
#28
multimodal commuter
Join Date: Nov 2006
Location: NJ, NYC, LI
Posts: 19,808
Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...
Mentioned: 584 Post(s)
Tagged: 0 Thread(s)
Quoted: 1908 Post(s)
Liked 574 Times
in
339 Posts
What we know of as "27 inch" was a proprietary size introduced by Dunlop in the 30's in hopes of cornering the market for high end clincher tires.
I'm not sure when 622mm clincher rims and tires became available. By the late 40's for sure.
__________________
www.rhmsaddles.com.
www.rhmsaddles.com.
#29
Senior Member
Join Date: Mar 2012
Location: Port Dover Ontario Canada
Posts: 1,545
Bikes: 1965 Dilecta Le Blanc, 1956 Royal Nord, 1972 Raleigh Sports, 1972 CCM Turismo,1976 SuperCycle Excalibur, 2014 Salsa Vaya, 2017 Felt DD70, 2019 Giant Lafree and others
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 351 Post(s)
Liked 600 Times
in
230 Posts
Two of my bikes are now running Schwalbe Silentos 700c. The Salsa Vaya touring bike came with 700c 40mm and I liked them so well I put a set on my Giant Hybrid. I replaced the kenda 700c38mm (measured 35mm) with Silento 35mm (measured 35mm). The Vaya soaks up lots of bad roads.
__________________
We are what we reflect. We are the changes that we bring to this world. Ride often. -Geo.-
We are what we reflect. We are the changes that we bring to this world. Ride often. -Geo.-
#30
Ride, Wrench, Swap, Race
Join Date: Jan 2010
Location: Northern California
Posts: 9,194
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Mentioned: 132 Post(s)
Tagged: 0 Thread(s)
Quoted: 1565 Post(s)
Liked 1,296 Times
in
866 Posts
You might also take a minute to consider how wide a tire the frame will accept, and if there is any real advantage to changing wheels. You always have to maintain enough clearance to avoid mud lockup, and in case your wheel comes out of true a bit. I don't know if they are still available, but Michelin used to make a 27x1-3/8 tire, roughly 35mm.
I think that you must be referring to the Michelin Hi-Lite Tour, a folding 1-3/8" tire that measured about 33mm wide. I have raced cyclocross on those!
That tire's tread pattern and actual sizing is accurately reflected in the much-heavier, current 27x1-1/4" World Tour tire, which is gum-walled with thick rubber and weighs the proverbial "ton".
Thread
Thread Starter
Forum
Replies
Last Post
Ian401
Cyclocross and Gravelbiking (Recreational)
18
06-25-19 01:16 PM