Winter Cycling Don't let snow and ice discourage you this winter. The key element to year-round cycling is proper attire! Check out this winter cycling forum to chat with other ice bike fanatics.

Marathon Winter psi

Reply

Old 12-03-17, 06:27 AM
  #1  
Bikewolf
Senior Member
Thread Starter
 
Join Date: Jan 2017
Posts: 235
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 68 Post(s)
Marathon Winter psi

I have 42 mm tyres, Marathon Winter. Which tyre pressure, perhaps as a starting point, would strike a good balance between traction/grip on ice and puncture resistance? 50 psi?
Bikewolf is offline  
Reply With Quote
Old 12-03-17, 06:57 AM
  #2  
bobwysiwyg 
Senior Member
 
Join Date: Jan 2016
Location: 42.2808 N, 83.7430 W (A2 😉)
Posts: 1,227

Bikes: Mongoose Selous gravel/adventure/whatever bike

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 390 Post(s)
I'm not aware of any non-studded tire that provides traction on ice.
__________________
"Skepticism is the first step in critical thinking." -- Me
bobwysiwyg is offline  
Reply With Quote
Old 12-03-17, 12:11 PM
  #3  
alias5000
Raised a new winter bike
 
Join Date: Apr 2016
Location: Ontario
Posts: 248

Bikes: 2005 Devinci St. Tropez, 2015 Devinci Silverstone SL4, 2012 Cannondale Road Tandem 2, 2007 Trek 6000

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 80 Post(s)
Originally Posted by bobwysiwyg View Post
I'm not aware of any non-studded tire that provides traction on ice.
Marathon winter is studded.
alias5000 is offline  
Reply With Quote
Old 12-03-17, 03:24 PM
  #4  
bobwysiwyg 
Senior Member
 
Join Date: Jan 2016
Location: 42.2808 N, 83.7430 W (A2 😉)
Posts: 1,227

Bikes: Mongoose Selous gravel/adventure/whatever bike

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 390 Post(s)
Ah, thanks, wasn't aware.
__________________
"Skepticism is the first step in critical thinking." -- Me
bobwysiwyg is offline  
Reply With Quote
Old 12-03-17, 07:01 PM
  #5  
Ghazmh
Senior Member
 
Ghazmh's Avatar
 
Join Date: Jan 2014
Location: Waltham Ma
Posts: 740

Bikes: 2017 Trek Boon 7, Specialized Roubaix SL4 Pro Race Disc, 2016 Soma Smoothie, 2015 Cervelo R3-6870 Di2 with a 2017 frame, 2014 Trek 520, 2006 Gary Fisher Montare

Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 193 Post(s)
I have them in 700x50 on my hybrid, I run 30 psi when it's not overtly icy out and 15 when it's icy.
Ghazmh is offline  
Reply With Quote
Old 12-03-17, 07:50 PM
  #6  
BobbyG
Senior Member
 
BobbyG's Avatar
 
Join Date: Jan 2009
Location: Colorado Springs, CO
Posts: 3,487

Bikes: 2015 Charge Plug, 1997 Nishiki Blazer, 1984 Nishiki International

Mentioned: 24 Post(s)
Tagged: 0 Thread(s)
Quoted: 554 Post(s)
I run 26"x1.6" Suomi/Nokian W106s studded tires which look similar as to number of studs and placement, but with a slightly more aggressive tread pattern and depth than the Marathon Winters. Given the differences in size and type, here's what I do:

Dry: 65psi (max rating)

Ice and/or packed snow: 30-33

Deep, loose snow 20-25psi This still works well for any ice, but it's a real drag on dry sections.
BobbyG is offline  
Reply With Quote
Old 12-04-17, 09:17 AM
  #7  
Leebo
Senior Member
 
Join Date: Aug 2009
Location: North of Boston
Posts: 5,130

Bikes: Kona Dawg, Surly 1x1, Karate Monkey, Rockhopper, Crosscheck , Burley Runabout,

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 633 Post(s)
Rim width and rider weight? Puncture? They are really beefy, should not worry about that. Grip? Run less. Sit on the bike and have the tires squish a bit. Me? 40 mm nokians, skinny rims, 235 lbs, usually run 30-35 or so.
Leebo is offline  
Reply With Quote
Old 12-06-17, 07:51 AM
  #8  
rumrunn6
Senior Member
 
rumrunn6's Avatar
 
Join Date: Jul 2008
Location: 25 miles northwest of Boston
Posts: 19,791

Bikes: Bottecchia Sprint

Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2044 Post(s)
max pressure on dry roads. when there is some precip just soften them up a bit
rumrunn6 is offline  
Reply With Quote
Old 12-06-17, 02:31 PM
  #9  
PaulRivers
Senior Member
 
Join Date: Jul 2008
Location: Minneapolis, MN
Posts: 5,889
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 214 Post(s)
Originally Posted by Bikewolf View Post
I have 42 mm tyres, Marathon Winter. Which tyre pressure, perhaps as a starting point, would strike a good balance between traction/grip on ice and puncture resistance? 50 psi?
Look on the tire sidewall for the recommended max and min pressure.

When it's pretty clear out and your only concern is small patch of black ice run them at the max pressure listed on the sidewall (I think it's like 65psi or something).

When it's grittier out run them at the lowest pressure listed on the sidewall (I think it might be 30psi? I'm not sure offhand).
PaulRivers is offline  
Reply With Quote
Old 12-13-17, 12:59 PM
  #10  
Bikewolf
Senior Member
Thread Starter
 
Join Date: Jan 2017
Posts: 235
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 68 Post(s)
Thank you all for your advice. Bye the bye, SMW tyres (42 mm) are 30 psi up to 70 psi.

Meanwhile, I’ve been running them at 40 psi when bad and up to 65 psi when danger is much less.

More important will to learn how to deal with types of snow, which risks I can take etc. Because some situations – even with studs – are quite challenging.

Last edited by Bikewolf; 12-14-17 at 01:17 PM.
Bikewolf is offline  
Reply With Quote
Old 12-13-17, 11:33 PM
  #11  
Gresp15C
Senior Member
 
Gresp15C's Avatar
 
Join Date: Sep 2014
Posts: 1,928
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 346 Post(s)
My new Marathon Winters are rated up to 85 psi. I've ridden them twice so far, in "snow that never really happened." If this is going to be like the last couple of years, there will actually be minimal snow or ice on the roads, and the studs are in case of a sudden change of weather, an ice storm, or patches of ice here and there. I think the higher pressure is where I'll stay until I have a reason to do otherwise.
Gresp15C is offline  
Reply With Quote
Old 12-14-17, 08:16 AM
  #12  
mcours2006
Senior Member
 
mcours2006's Avatar
 
Join Date: Jul 2014
Location: Toronto, CANADA
Posts: 5,094

Bikes: Giant Rapid, Bianchi Advantage, Specialized Roubaix, 1985 Gardin Quatro, Norco Threshold, Raleigh Serengheti MTB

Mentioned: 36 Post(s)
Tagged: 0 Thread(s)
Quoted: 1464 Post(s)
My 35-mm Marathons are rate for 35-85 psi. I probably run them at 60 psi.
mcours2006 is offline  
Reply With Quote
Old 12-15-17, 10:29 AM
  #13  
srestrepo
Senior Member
 
Join Date: Jul 2014
Location: Western, MA
Posts: 288

Bikes: 2016 Felt Z85 105, 2016 GT Grade Sora

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 98 Post(s)
i just my marathon winters on yesterday - i'm running them at 85 psi. they're mounted on 19mm internal width rims. my biggest concern is my weight. at 265, if i run them much lower, i'd be afraid of pinch flats. not that i'm hopping curbs or riding aggressively but still... anyone with a similar weight as me care to comment on how low you run the pressure before you get pinch flats?
srestrepo is offline  
Reply With Quote
Old 12-30-17, 06:53 PM
  #14  
rumrunn6
Senior Member
 
rumrunn6's Avatar
 
Join Date: Jul 2008
Location: 25 miles northwest of Boston
Posts: 19,791

Bikes: Bottecchia Sprint

Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2044 Post(s)
mounted up my 40s. massaged them onto the wheels as I pumped them up slowly, then brought them right up to their max 70psi. test ride around my immediate neighborhood on plowed streets w lots of 2" thick ice covering large portions of the roadway including one steep hill climb. everything checks out perfectly


Last edited by rumrunn6; 12-30-17 at 06:56 PM.
rumrunn6 is offline  
Reply With Quote
Old 12-31-17, 12:48 AM
  #15  
ThermionicScott 
Hammer and tongs
 
ThermionicScott's Avatar
 
Join Date: Aug 2011
Location: CID
Posts: 17,141

Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers)

Mentioned: 50 Post(s)
Tagged: 0 Thread(s)
Quoted: 1535 Post(s)
Originally Posted by srestrepo View Post
i just my marathon winters on yesterday - i'm running them at 85 psi. they're mounted on 19mm internal width rims. my biggest concern is my weight. at 265, if i run them much lower, i'd be afraid of pinch flats. not that i'm hopping curbs or riding aggressively but still... anyone with a similar weight as me care to comment on how low you run the pressure before you get pinch flats?
You could probably knock 10psi off the front for starters. If I'm playing around with tire pressures, I'll take glances at the bottoms of the wheels while riding to see how much the tire bulges at the contact patch. A little is okay, but if it's squatting a lot you may want to use more pressure or move up to the next tire size.
__________________
Originally Posted by noglider
People in this forum are not typical.
Originally Posted by chandltp View Post
There's no such thing as too far.. just lack of time
RUSA #7498
ThermionicScott is offline  
Reply With Quote
Old 01-05-18, 03:13 PM
  #16  
rumrunn6
Senior Member
 
rumrunn6's Avatar
 
Join Date: Jul 2008
Location: 25 miles northwest of Boston
Posts: 19,791

Bikes: Bottecchia Sprint

Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2044 Post(s)
hitting the ice & snow covered paved trail yesterday, rode for some time at max pressure then decided I wanted more contact, so let out some air from the front & a little less than that from the rear. kinda like 2 seconds from the front & 1 second from the rear. felt like the right amount after getting going again. sorry didn't measure them
rumrunn6 is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Terms of Service