Inflating 650b x 47 tires?
#1
Thread Killer
Thread Starter
Join Date: Aug 2008
Location: Ann Arbor, MI
Posts: 12,373
Bikes: 15 Kinesis Racelight 4S, 76 Motebecane Gran Jubilée, 17 Dedacciai Gladiatore2, 12 Breezer Venturi, 09 Dahon Mariner, 12 Mercier Nano, 95 DeKerf Team SL, 19 Tern Rally, 21 Breezer Doppler Cafe+, 19 T-Lab X3, 91 Serotta CII
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 3078 Post(s)
Liked 1,631 Times
in
1,005 Posts
Inflating 650b x 47 tires?
Hi folks,
For on-the-road inflation, I know a frame-fit pump is the obvious choice, but could CO2 be used as well? How many of the big, 16g cartridges would be needed to get that tire to, say, 55lbs psi? Are there any other options?
TIA
For on-the-road inflation, I know a frame-fit pump is the obvious choice, but could CO2 be used as well? How many of the big, 16g cartridges would be needed to get that tire to, say, 55lbs psi? Are there any other options?
TIA
#2
Senior Member
Join Date: May 2013
Location: Kips Bay, NY
Posts: 2,212
Bikes: Ritchey Swiss Cross | Teesdale Kona Hot | Haro Extreme | Specialized Stumpjumper Comp | Cannondale F1000 | Shogun 1000 | Cannondale M500 | Norco Charger | Marin Muirwoods 29er | Shogun Kaze | Breezer Lightning
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 576 Post(s)
Liked 989 Times
in
484 Posts
Gas stations, this electric pump from Fumpa.
#3
Senior Member
Join Date: Jan 2013
Location: South Jersey
Posts: 2,258
Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 712 Post(s)
Liked 793 Times
in
471 Posts
A 16g CO2 should work fine, although it may not get to 55psi. I usually carry 2, just in case the sealant fails and I need to install a tube.
On a side note, I don't know why anyone would want to run that size tire at that pressure. I have Terrene Elwood 650 x 47 tubeless tires on my gravel bike and I run them at 28psi rear and 25psi front. Even a few psi higher than that and it results in a very harsh ride.
On a side note, I don't know why anyone would want to run that size tire at that pressure. I have Terrene Elwood 650 x 47 tubeless tires on my gravel bike and I run them at 28psi rear and 25psi front. Even a few psi higher than that and it results in a very harsh ride.
Likes For dsaul:
#4
Senior Member
Join Date: Jun 2010
Location: ATX
Posts: 637
Bikes: CO-OP ADV 3.1 aka Beeftank (stolen, RIP), State All-Road
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 96 Post(s)
Liked 144 Times
in
75 Posts
Agreed. There’s no point in riding 650b at that pressure. I’m usually at 20psi, fwiw (I run tubeless and I weigh 150lbs.).
#5
Thread Killer
Thread Starter
Join Date: Aug 2008
Location: Ann Arbor, MI
Posts: 12,373
Bikes: 15 Kinesis Racelight 4S, 76 Motebecane Gran Jubilée, 17 Dedacciai Gladiatore2, 12 Breezer Venturi, 09 Dahon Mariner, 12 Mercier Nano, 95 DeKerf Team SL, 19 Tern Rally, 21 Breezer Doppler Cafe+, 19 T-Lab X3, 91 Serotta CII
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 3078 Post(s)
Liked 1,631 Times
in
1,005 Posts
Thanks for the replies!
First off, I have no idea what pressure I should be riding at! Haha! I just got the bike built yesterday, and only rode up and down the street in font of the house to make sure I didn’t bolt something up backwards. I’m 230lbs and used to running 25mm tires at 100psi, so I just pulled the idea of 55psi for the 47mm out of butt; any pressure reccos based on my weight?
The bike came tubed, and I didn’t feel like converting it to tubeless right now, but probably will at some point. My roadies are tubeless, so I have some familiarity there.
It’s great to know a pair of 16g cartridges will be ample, because I have some of those on hand to build a kit bag with! My wife is also getting suspicious about how much I’ve spent already— too many packages on the porch!— and it’s true I’m a bit over the number I had in my head, so I’m not chomping at the bit to throw down nearly $200 on an Impero pump immediately; that can wait until spring.
First off, I have no idea what pressure I should be riding at! Haha! I just got the bike built yesterday, and only rode up and down the street in font of the house to make sure I didn’t bolt something up backwards. I’m 230lbs and used to running 25mm tires at 100psi, so I just pulled the idea of 55psi for the 47mm out of butt; any pressure reccos based on my weight?
The bike came tubed, and I didn’t feel like converting it to tubeless right now, but probably will at some point. My roadies are tubeless, so I have some familiarity there.
It’s great to know a pair of 16g cartridges will be ample, because I have some of those on hand to build a kit bag with! My wife is also getting suspicious about how much I’ve spent already— too many packages on the porch!— and it’s true I’m a bit over the number I had in my head, so I’m not chomping at the bit to throw down nearly $200 on an Impero pump immediately; that can wait until spring.
Likes For chaadster:
#6
Senior Member
Join Date: Jun 2010
Location: ATX
Posts: 637
Bikes: CO-OP ADV 3.1 aka Beeftank (stolen, RIP), State All-Road
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 96 Post(s)
Liked 144 Times
in
75 Posts
Thanks for the replies!
First off, I have no idea what pressure I should be riding at! Haha! I just got the bike built yesterday, and only rode up and down the street in font of the house to make sure I didn’t bolt something up backwards. I’m 230lbs and used to running 25mm tires at 100psi, so I just pulled the idea of 55psi for the 47mm out of butt; any pressure reccos based on my weight?
The bike came tubed, and I didn’t feel like converting it to tubeless right now, but probably will at some point. My roadies are tubeless, so I have some familiarity there.
It’s great to know a pair of 16g cartridges will be ample, because I have some of those on hand to build a kit bag with! My wife is also getting suspicious about how much I’ve spent already— too many packages on the porch!— and it’s true I’m a bit over the number I had in my head, so I’m not chomping at the bit to throw down nearly $200 on an Impero pump immediately; that can wait until spring.
First off, I have no idea what pressure I should be riding at! Haha! I just got the bike built yesterday, and only rode up and down the street in font of the house to make sure I didn’t bolt something up backwards. I’m 230lbs and used to running 25mm tires at 100psi, so I just pulled the idea of 55psi for the 47mm out of butt; any pressure reccos based on my weight?
The bike came tubed, and I didn’t feel like converting it to tubeless right now, but probably will at some point. My roadies are tubeless, so I have some familiarity there.
It’s great to know a pair of 16g cartridges will be ample, because I have some of those on hand to build a kit bag with! My wife is also getting suspicious about how much I’ve spent already— too many packages on the porch!— and it’s true I’m a bit over the number I had in my head, so I’m not chomping at the bit to throw down nearly $200 on an Impero pump immediately; that can wait until spring.
Here is a good place to start for pressure: https://info.silca.cc/silca-professi...ure-calculator
I started riding 650b in the spring and will never go back to 700c. Welcome to the club
Don’t worry about tubeless for now. Just enjoy the ride!
#7
Junior Member
My Electra Townie has 26" x 2.0" tires. I keep them at 50psi to reduce the risk of pinch flats.
Though I'm a Super Clyde (315 lbs.), maybe I can reduce the psi a bit to get a more comfortable ride?
Though I'm a Super Clyde (315 lbs.), maybe I can reduce the psi a bit to get a more comfortable ride?
#8
Thread Killer
Thread Starter
Join Date: Aug 2008
Location: Ann Arbor, MI
Posts: 12,373
Bikes: 15 Kinesis Racelight 4S, 76 Motebecane Gran Jubilée, 17 Dedacciai Gladiatore2, 12 Breezer Venturi, 09 Dahon Mariner, 12 Mercier Nano, 95 DeKerf Team SL, 19 Tern Rally, 21 Breezer Doppler Cafe+, 19 T-Lab X3, 91 Serotta CII
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 3078 Post(s)
Liked 1,631 Times
in
1,005 Posts
Awesome! Post pics!
Here is a good place to start for pressure: https://info.silca.cc/silca-professi...ure-calculator
I started riding 650b in the spring and will never go back to 700c. Welcome to the club
Don’t worry about tubeless for now. Just enjoy the ride!
Here is a good place to start for pressure: https://info.silca.cc/silca-professi...ure-calculator
I started riding 650b in the spring and will never go back to 700c. Welcome to the club
Don’t worry about tubeless for now. Just enjoy the ride!
I started a thread on the bike, a Breezer Doppler, over in General:
https://www.bikeforums.net/general-c...pler-cafe.html
Likes For chaadster: