gitaneusa.com Forum Index » Vintage Gitane » clipless Shimano pedals to Stonglight crank?    View previous topic :: View next topic  clipless Shimano pedals to Stonglight crank?   Posted: Tue Dec 22, 2009 2:55 pm Bigbird Joined: 09 Dec 2008 Posts: 11 Location: The Adirondacks, in Northern NY I've got a spare set of Shimano clipless pedals that I thought I might try on my 1974 TdF. It's got the Stonglight cranks and I'm not sure if the threading will match up with the modern pedals. _________________ "Let's be careful out there" Metric vs. British Pedal Threads   Posted: Tue Dec 22, 2009 8:40 pm verktyg Joined: 14 Jan 2007 Posts: 2814 Location: SF Bay Area Metric 14mm x 1.25 pedal threads are slightly smaller diameter than British 9/16-20 TPI threads (by about .010" or 0.25mm) but the thread pitch is very close. First off, check to make sure that the cranks haven't already been retapped to 9/16". Lyotard aluminum 460D pedals came standard on early 1970s TdFs. An experienced bike mechanic with a proper set of 9/16" pedal taps can easily tap out the 14mm threads on your cranks to 9/16". Proper because the pedals taps in most shops were worn out years ago from retapping the threads in steel crank arms. There's special tapping compound for aluminum that makes the job easy! A ham fisted hammer mechanic and/or dull taps can cause the threads to be recut "bell mouthed" or crooked and the pedal axle or axles will sit crooked in the crank arm. I just retapped the threads in an old alloy TA crankset. Someone had forced a set of of British threaded pedals into a metric crankset... "It could happen" Note: left hand pedals have left hand threads. _________________ Chas. SF Bay Area, CA USA ============== 1984 Criterium 1969 TdF 1971 TdF 1974 TdF 1984 TdF x 2 Bikes 1970 SC 1971 SC 1972 SC 1984 SC 1984 Team Pro 1985 Professional 1990s Team Replica Re: Metric vs. British Pedal Threads   Posted: Wed Dec 23, 2009 2:43 am Wisey Joined: 19 May 2009 Posts: 631 Location: Brisbane, Australia verktyg wrote: Note: left hand pedals have left hand threads. Damn! Is that what I've been doing wrong all these years? _________________ Kind Regards, Wisey Delta Dreamin' Coriolis effect   Posted: Wed Dec 23, 2009 3:38 am verktyg Joined: 14 Jan 2007 Posts: 2814 Location: SF Bay Area Wisey, It's the Coriolis effect! You folks are just backwards down there! _________________ Chas. SF Bay Area, CA USA ============== 1984 Criterium 1969 TdF 1971 TdF 1974 TdF 1984 TdF x 2 Bikes 1970 SC 1971 SC 1972 SC 1984 SC 1984 Team Pro 1985 Professional 1990s Team Replica   Posted: Wed Dec 23, 2009 12:30 pm Wisey Joined: 19 May 2009 Posts: 631 Location: Brisbane, Australia Yeah, that's right. We drive on the other side of the road, water goes down the plug hole in the other direction, and right hand pedals have left hand threads....... Oh the other important thing that we do diffeet to the rest of the world..... we don't drink Fosters! _________________ Kind Regards, Wisey Delta Dreamin'   Posted: Wed Dec 23, 2009 2:01 pm sandranian Site Admin Joined: 27 Feb 2006 Posts: 2701 Location: Southern California I call bullsh*t Wisey! I heard somewhere that Fosters was Australian for Beer. _________________ Stephan Andranian Costa Mesa, CA www.gitaneusa.com   Posted: Wed Dec 23, 2009 5:58 pm Wisey Joined: 19 May 2009 Posts: 631 Location: Brisbane, Australia Yuk! Terrible stuff. Here's what I will be drinking tomorrow out on the back deck, basking in 30C heat, eating cold ham, salad & BBQ prawns. http://www.maltshovel.com.au/#/beerSundown/ Now that's what Xmas is about. None of this sonw and turkey nonsense . Have a great Xmas / Holiday everyone. _________________ Kind Regards, Wisey Delta Dreamin'   Posted: Wed Dec 23, 2009 7:26 pm sandranian Site Admin Joined: 27 Feb 2006 Posts: 2701 Location: Southern California If (when) you come to California, bring me some Sheaf Stout. _________________ Stephan Andranian Costa Mesa, CA www.gitaneusa.com   Posted: Wed Dec 23, 2009 7:40 pm Wisey Joined: 19 May 2009 Posts: 631 Location: Brisbane, Australia sandranian wrote: If (when) you come to California, bring me some Sheaf Stout. Sure . But you know it's owned by Fosters now, right? _________________ Kind Regards, Wisey Delta Dreamin' Re: Metric vs. British Pedal Threads   Posted: Thu Dec 24, 2009 2:52 am Bigbird Joined: 09 Dec 2008 Posts: 11 Location: The Adirondacks, in Northern NY verktyg wrote: Metric 14mm x 1.25 pedal threads are slightly smaller diameter than British 9/16-20 TPI threads (by about .010" or 0.25mm) but the thread pitch is very close. First off, check to make sure that the cranks haven't already been retapped to 9/16". Lyotard aluminum 460D pedals came standard on early 1970s TdFs. An experienced bike mechanic with a proper set of 9/16" pedal taps can easily tap out the 14mm threads on your cranks to 9/16". Proper because the pedals taps in most shops were worn out years ago from retapping the threads in steel crank arms. There's special tapping compound for aluminum that makes the job easy! A ham fisted hammer mechanic and/or dull taps can cause the threads to be recut "bell mouthed" or crooked and the pedal axle or axles will sit crooked in the crank arm. I just retapped the threads in an old alloy TA crankset. Someone had forced a set of of British threaded pedals into a metric crankset... "It could happen" Note: left hand pedals have left hand threads. Yeah, the pedals are Lyotard aluminum, and they're original. I bought the bike new back in 1973 or 74 and have had it ever since so it's all original - except the derailler which broke and was replace @ 30 years ago. My local shop can tap out the Stonglight cranks to fit the Shimano clipless pedals, but I think I'll pass on it as I don't want to permenently alter the bike. Guess I'll just stay with the "vintage" look, both the bike and me _________________ "Let's be careful out there"   Posted: Thu Dec 24, 2009 12:18 pm sandranian Site Admin Joined: 27 Feb 2006 Posts: 2701 Location: Southern California Bravo! _________________ Stephan Andranian Costa Mesa, CA www.gitaneusa.com clipless Shimano pedals to Stonglight crank?     gitaneusa.com Forum Index » Vintage Gitane You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum All times are GMT - 8 Hours   Page 1 of 1   All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First  Select a forum Gitane USA----------------Vintage GitaneGitane RacingModern GitanePro Racing - Classics/Giro/Tour....Owner Gallery   Powered by phpBB © 2001-2004 phpBB Group Designed for Trushkin.net | Themes Database.