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GT85 - bad for your bike?

mattdanielcmattdanielc Posts: 41
edited May 2019 in Commuting chat
I'd like some advice about cleaning my bike if I may - I have a new bike and want to ensure I'm not doing any bad practices from my old routine.

I clean my bike every Saturday. I use 'muc off' products. I don't think I'm gonig wrong with any of this.

But...I do use GT85 on the cassette. This sprays off the grime and makes the cassette all shiny again. I sometimes, but not always, spray the chain too. After this I hose the cassette down to get all of the oil off.

I then put lube on the chain.

IS GT85 ok to clean the cassette like that? On my old bike as well I had some round plastic behind my cassette meaning that the spray couldn't reach my disc brakes. But my new bike doesn't have this plastic - so I'm worried when I spray it will get my discs too...

Would appreciate any advice :)


  • kingstongrahamkingstongraham Posts: 25,849
    Hope it's OK, it's about the only maintenance my bike gets.
  • veronese68veronese68 Posts: 26,906 Lives Here
    It's fine for most things, but cover your brakes up as it really doesn't want to be anywhere near them.
  • frogonabikefrogonabike Posts: 157
    Yeah it's fine, I saw some test recently that showed it as one of the best (or maybe THE best) for chain friction... as already mentioned avoid brakes and also be mindful of bearings as it will clear out the grease in your freehub, bb etc In fact do you really need to give it a proper clean every week? I tend to do a "dry" clean with just a rag and a small amount of GT85 regularly + a chain lube then a proper strip and scrub every 50ish hours

    Also, WD40 is actually better for the stubborn stuff on frames etc
  • mtb-idlemtb-idle Posts: 2,179
    the Mucoff which is quite aggressive and the hosing it off with water are both probably doing more harm than the GT85
    FCN = 4
  • cyclecliniccycleclinic Posts: 6,865
    Too much cleaning. Better to use a lube (not much off or oils) that does not junk up the chain and cassette in the first place. I have only found one brand of lube that truly does this.

    No your not harming you bike using gt85 for cleaning but it does works it's way into the pins and rollers in the chain and relining does not push it all out so chain wear will be accelerated. -wheel building and other stuff.
  • elbowlohelbowloh Posts: 7,078
    I never clean my bikes and they are all currently running fine.

    I used to regularly clean them and spend whole weekends stripping them down, cleaning, lubing, greasing and re-assembling, but then I got married.
    Felt F1 2014
    Felt Z6 2012
    Red Arthur Caygill steel frame
  • itboffinitboffin Posts: 20,050
    Is it just me or does GT85 smell awesome ...?
    Rule #5 // Harden The censored Up.
    Rule #9 // If you are out riding in bad weather, it means you are a badass. Period.
    Rule #12 // The correct number of bikes to own is n+1.
    Rule #42 // A bike race shall never be preceded with a swim and/or followed by a run.
  • roger_merrimanroger_merriman Posts: 6,165
    I’m sure it’s fine for cleaning/lubing as you do, but personally I don’t use any spray oils since all my bikes are disk and it’s very easy to get a bit on the rotor/pad.

    Equally I’ve found that dry oils suit me better, my present favourite is squirt? Which seems fairly robust for a wax oil.
  • hopkinbhopkinb Posts: 7,129
    I get through 3 cans a week. Goes nowhere near the bike mind you.
  • frogonabikefrogonabike Posts: 157
    itboffin wrote:
    Is it just me or does GT85 smell awesome ...?

    A sniff of GT is part of my getting ready for a ride procedure :D
  • cyclecliniccycleclinic Posts: 6,865
    3 cans a week = rehab -wheel building and other stuff.
  • hopkinbhopkinb Posts: 7,129
    3 cans a week = rehab
    Nah, I can handle it. It's under control. Stop any time I want. Erm. Sniff.
  • mrkev83mrkev83 Posts: 184
    My road bike is at least 4 years old and I've used GT85 most that time without any issues

    Built for comfort... Not for speed
  • merkinmerkin Posts: 452
    I have found that a couple deep sniffs of GT85 before a ride gives me a 5% increase in speed over the course of a ride.
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