Move to 28c or not?

2

Comments

  • bungle73
    bungle73 Posts: 758
    The best pressure calculator I have found (and the one I resort to using myself) is available here: http://fastfitness.tips/about
  • dstev55
    dstev55 Posts: 742
    Bungle73 wrote:
    The best pressure calculator I have found (and the one I resort to using myself) is available here: http://fastfitness.tips/about

    I'm not paying for someone to tell me how much air I need in my tyres!
  • bungle73
    bungle73 Posts: 758
    edited March 2018
    dstev55 wrote:
    Bungle73 wrote:
    The best pressure calculator I have found (and the one I resort to using myself) is available here: http://fastfitness.tips/about

    I'm not paying for someone to tell me how much air I need in my tyres!

    Pay? What? It's free..............
  • sloppyschleckonds
    sloppyschleckonds Posts: 8,019
    dstev55 wrote:

    It says 51 front and 78 for the rear on 28s. That's too much of a gap for my liking. Quite happy to try 70 front and 78 on the rear though.

    The worst thing about giving advise is people not listening to it
    I'm sorry you don't believe in miracles
  • grenw
    grenw Posts: 804
    dstev55 wrote:
    It says 51 front and 78 for the rear on 28s. That's too much of a gap for my liking. Quite happy to try 70 front and 78 on the rear though.

    I ride with 70 front and 80 back and could probably drop quite a bit more on the front based on how little the front squashes compared to the back. 60/80 would probably be okay. Not sure about 51 but if you drop it in increments then who knows...
  • N0bodyOfTheGoat
    N0bodyOfTheGoat Posts: 6,057
    I ran my 700x28 Grand Sport Races, that really measure ~31mm on 20mm internal rim width wheels, at ~60/80PSI last summer on the Voodoo.

    Based on me plus Voodoo in 29er mode being ~93Kg in work commute gear, using the FastFitnessTips original Google Docs calculator as a guide.

    It suggests I could drop the front to ~53PSI, which is fine on the flat and downhill, but gets a bit too squishy for my liking when I'm climbing hills out of the saddle.
    ================
    2020 Voodoo Marasa
    2017 Cube Attain GTC Pro Disc 2016
    2016 Voodoo Wazoo
  • dstev55
    dstev55 Posts: 742
    Bungle73 wrote:
    dstev55 wrote:
    Bungle73 wrote:
    The best pressure calculator I have found (and the one I resort to using myself) is available here: http://fastfitness.tips/about

    I'm not paying for someone to tell me how much air I need in my tyres!

    Pay? What? It's free..............

    Ok saw something about paying, I am guessing it refers to tweeting or posting on Facebook to advertise it to enable the download. Don't use Twitter or Facebook so that's me done.
  • dstev55
    dstev55 Posts: 742
    SloppySchleckonds wrote:
    dstev55 wrote:

    It says 51 front and 78 for the rear on 28s. That's too much of a gap for my liking. Quite happy to try 70 front and 78 on the rear though.

    The worst thing about giving advise is people not listening to it

    It is isn't it?

    The thing is I've never actually asked for any advice about tyre pressures.

    What I did ask for was advice on tyre widths and on the basis of the advice on here I went and bought 28's so I guess that means I do listen to it?
  • sloppyschleckonds
    sloppyschleckonds Posts: 8,019
    dstev55 wrote:
    SloppySchleckonds wrote:
    dstev55 wrote:

    It says 51 front and 78 for the rear on 28s. That's too much of a gap for my liking. Quite happy to try 70 front and 78 on the rear though.

    The worst thing about giving advise is people not listening to it

    It is isn't it?

    The thing is I've never actually asked for any advice about tyre pressures.

    What I did ask for was advice on tyre widths and on the basis of the advice on here I went and bought 28's so I guess that means I do listen to it?

    How about you keep an open mind about it, give it ago and report back findings
    I'm sorry you don't believe in miracles
  • oscarbudgie
    oscarbudgie Posts: 850
    Michelin Pro4 Service Course 25's are excellent (as good as GP4000's imo) and also 'come up' closer to 28 if that helps
    Cannondale Supersix / CAAD9 / Boardman 9.0 / Benotto 3000
  • N0bodyOfTheGoat
    N0bodyOfTheGoat Posts: 6,057
    Finally got around to riding the "28" (~31mm on 17mm internal rim width) Grand Sport Race on the rear yesterday, to match the front that has been in place for months. Even at slightly higher pressures than I've used in the past for this set (~70/88PSI), my body (especially lower back) felt fine, despite riding quite hard and setting a few segment PBs (including a cat4 and a local short incline).

    Think I'm sold.
    ================
    2020 Voodoo Marasa
    2017 Cube Attain GTC Pro Disc 2016
    2016 Voodoo Wazoo
  • thefd
    thefd Posts: 1,021
    Bungle73 wrote:
    dstev55 wrote:
    Bungle73 wrote:
    The best pressure calculator I have found (and the one I resort to using myself) is available here: http://fastfitness.tips/about

    I'm not paying for someone to tell me how much air I need in my tyres!

    Pay? What? It's free..............
    Pay with a tweet....
    2017 - Caadx
    2016 - Cervelo R3
    2013 - R872
    2010 - Spesh Tarmac
  • bungle73
    bungle73 Posts: 758
    TheFD wrote:
    Bungle73 wrote:
    dstev55 wrote:
    Bungle73 wrote:
    The best pressure calculator I have found (and the one I resort to using myself) is available here: http://fastfitness.tips/about

    I'm not paying for someone to tell me how much air I need in my tyres!

    Pay? What? It's free..............
    Pay with a tweet....

    Except that isn't actually paying though is it.
  • dstev55
    dstev55 Posts: 742
    Bungle73 wrote:
    TheFD wrote:
    Bungle73 wrote:
    dstev55 wrote:
    Bungle73 wrote:
    The best pressure calculator I have found (and the one I resort to using myself) is available here: http://fastfitness.tips/about

    I'm not paying for someone to tell me how much air I need in my tyres!

    Pay? What? It's free..............
    Pay with a tweet....

    Except that isn't actually paying though is it.

    No but it helps if you use Twitter or Facebook :roll:
  • Poppa Wheelie
    Poppa Wheelie Posts: 95
    With regard to tyre pressures I suggest you google Frank Berto. He came up with a formula back in the 80's which no one seems to have improved upon.

    http://road.cc/content/feature/180830-how-choose-your-tyre-pressure-%E2%80%94-balancing-speed-comfort-and-grip
  • bungle73
    bungle73 Posts: 758
    edited March 2018
    dstev55 wrote:
    Bungle73 wrote:
    TheFD wrote:
    Bungle73 wrote:
    dstev55 wrote:
    Bungle73 wrote:
    The best pressure calculator I have found (and the one I resort to using myself) is available here: http://fastfitness.tips/about

    I'm not paying for someone to tell me how much air I need in my tyres!

    Pay? What? It's free..............
    Pay with a tweet....

    Except that isn't actually paying though is it.

    No but it helps if you use Twitter or Facebook :roll:

    Stop being so damn self-centred.
  • bungle73
    bungle73 Posts: 758
    Poppa Wheelie wrote:
    With regard to tyre pressures I suggest you google Frank Berto. He came up with a formula back in the 80's which no one seems to have improved upon.

    http://road.cc/content/feature/180830-how-choose-your-tyre-pressure-%E2%80%94-balancing-speed-comfort-and-grip

    That's what the spreadsheet I already posted is based on, as well as work by Dave Adams, as pressure guides by tyre manufacturers, but it is much more clear than a vague graph, which what I said earlier.

    The guy who created it clearly knows his stuff - here's the video go with it: https://www.youtube.com/watch?v=Clk_LLBYFzA
  • bungle73
    bungle73 Posts: 758
    dstev55 wrote:
    Bungle73 wrote:
    dstev55 wrote:
    Bungle73 wrote:
    TheFD wrote:
    Bungle73 wrote:
    dstev55 wrote:
    Bungle73 wrote:
    The best pressure calculator I have found (and the one I resort to using myself) is available here: http://fastfitness.tips/about

    I'm not paying for someone to tell me how much air I need in my tyres!

    Pay? What? It's free..............
    Pay with a tweet....

    Except that isn't actually paying though is it.

    No but it helps if you use Twitter or Facebook :roll:

    Stop being so damn self-centred.

    Just shut up. Go and post your drivel on another prefereably non-bike related forum where I'm not likely to cross paths with you.

    But before you do please update your calamitous Merlin thread with how hard they laughed at you when you complained to them on the Monday.

    What a tit you are. Your parents must be so proud.
  • dstev55
    dstev55 Posts: 742
    They are. Now do one.
  • bungle73
    bungle73 Posts: 758
    dstev55 wrote:
    They are. Now do one.
    What the f is your problem? I came on here to share something I thought would be helpful and you threw it back in my face. Who the hell do you think you are?
  • dstev55
    dstev55 Posts: 742
    Bungle73 wrote:
    dstev55 wrote:
    They are. Now do one.
    What the f is your problem? I came on here to share something I thought would be helpful and you threw it back in my face. Who the hell do you think you are?

    Somebody who cares not one minute for your opinion like I'm guessing a good majority of people on here also don't.
  • bungle73
    bungle73 Posts: 758
    edited March 2018
    dstev55 wrote:
    Bungle73 wrote:
    dstev55 wrote:
    They are. Now do one.
    What the f is your problem? I came on here to share something I thought would be helpful and you threw it back in my face. Who the hell do you think you are?

    Somebody who cares not one minute for your opinion like I'm guessing a good majority of people on here also don't.

    Consider yourself reported. Most forums I've been a member of don't tolerate members abusing other members. I'm done with this thread. People like you don't deserve to be helped. What an absolutely ungrateful wretch you are.
  • dstev55
    dstev55 Posts: 742
    Bungle73 wrote:
    dstev55 wrote:
    Bungle73 wrote:
    dstev55 wrote:
    They are. Now do one.
    What the f is your problem? I came on here to share something I thought would be helpful and you threw it back in my face. Who the hell do you think you are?

    Somebody who cares not one minute for your opinion like I'm guessing a good majority of people on here also don't.

    Consider yourself reported. Most forums I've been a member off don't tolerate members abusing other members. I'm done with this thread. People like you don't deserve to be helped. What an absolutely ungrateful wretch you are.

    Thanks.

    Back on topic, I'm very happy I moved to 28's. My Bianchi is much more comfortable on my Vittoria Corsa G+ 28's than it was on the S Work Turbo 26's. I've only ridden it twice with the rear at 80 and front at 70. I did read somewhere that if you are a hard descender then you're better off keeping the front pressure quite high so I'll experiment a bit with as I am a keen descender. On one of the rides I did clout a pothole at 40mph, everything survived but I do wonder what might have happened if the front pressure was lower.
  • lettingthedaysgoby
    lettingthedaysgoby Posts: 1,732
    Bungle73 wrote:
    Most forums I've been a member off...
    You’ve been banned from? :mrgreen:
  • sloppyschleckonds
    sloppyschleckonds Posts: 8,019
    dstev55 wrote:
    I am a keen descender.

    What does that even mean?
    I'm sorry you don't believe in miracles
  • dstev55
    dstev55 Posts: 742
    SloppySchleckonds wrote:
    dstev55 wrote:
    I am a keen descender.

    What does that even mean?

    It means I like to push on going down hills, generally in the drops, rather than sitting on my brakes on the hoods like many people do.

    Would have thought it would have been pretty obvious to be honest :?
  • sloppyschleckonds
    sloppyschleckonds Posts: 8,019
    dstev55 wrote:
    SloppySchleckonds wrote:
    dstev55 wrote:
    I am a keen descender.

    What does that even mean?

    It means I like to push on going down hills, generally in the drops, rather than sitting on my brakes on the hoods like many people do.

    Would have thought it would have been pretty obvious to be honest :?

    So like 99% of anyone who rides a bike then?
    I'm sorry you don't believe in miracles
  • haydenm
    haydenm Posts: 2,997
    SloppySchleckonds wrote:
    dstev55 wrote:
    SloppySchleckonds wrote:
    dstev55 wrote:
    I am a keen descender.

    What does that even mean?

    It means I like to push on going down hills, generally in the drops, rather than sitting on my brakes on the hoods like many people do.

    Would have thought it would have been pretty obvious to be honest :?

    So like 99% of anyone who rides a bike then?

    I know plenty of people who don't like push on the descents. 28s definitely add to descending confidence in my experience, not sure if that is a good thing or not though...
  • sloppyschleckonds
    sloppyschleckonds Posts: 8,019
    HaydenM wrote:
    SloppySchleckonds wrote:
    dstev55 wrote:
    SloppySchleckonds wrote:
    dstev55 wrote:
    I am a keen descender.

    What does that even mean?

    It means I like to push on going down hills, generally in the drops, rather than sitting on my brakes on the hoods like many people do.

    Would have thought it would have been pretty obvious to be honest :?

    So like 99% of anyone who rides a bike then?

    I know plenty of people who don't like push on the descents. 28s definitely add to descending confidence in my experience, not sure if that is a good thing or not though...

    I saw a guy in Majorca once descending very slowly on the hoods, with disc brakes.
    Probably crashed a lot so taking it steady
    I'm sorry you don't believe in miracles
  • haydenm
    haydenm Posts: 2,997
    Descending on the top tube, it's the only way for keen descenders

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