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Technical & Reference Section => Tech and Restoration => Topic started by: hhp802n on May 11, 2009, 01:37 PM

Title: Wheel nuts... different threads? Help...!
Post by: hhp802n on May 11, 2009, 01:37 PM

Hi Guys... 

After patiently waiting the last 3 weeks to get on to my current build, a 1980 white and red mongoose motmag, i get to Sunday afternoon and...

I couldn't get it finished!!!

My problem.  Rear Motomag wheel, with reusable guts...  nicely cleaned and put back together ready to fit.. when i realise i am missing the rear wheel nut off one side...  this in most cases not being a problem i went into my box of bits to pull out every single nut i can find and none of them will fit....  Is it because the axle is american, and uses imperial or metric threads...?  I tried to put a bolt from my american 81 mongoose and it started to cross thread... 

I even stripped it back down ready to put onto a new axle but the bendix coaster bits wouldn't fit the thread of my replacement axle...

Am i being stupid (admittedly not knowing the difference between imperial and metric would highlight i am not a mechanical genius..)

Help please...

Title: Re: Wheel nuts... different threads? Help...!
Post by: Bob_Acid on May 11, 2009, 01:59 PM

There are different sizes, i think it's 26tpi on most but Skyway used 24tpi could be something else on motomags though i'm sure someone will know for sure. Do you have any skyways to try?

Title: Re: Wheel nuts... different threads? Help...!
Post by: hhp802n on May 11, 2009, 02:26 PM

Quote from: Bob_Acid on May 11, 2009, 01:59 PM

There are different sizes, i think it's 26tpi on most but Skyway used 24tpi could be something else on motomags though i'm sure someone will know for sure. Do you have any skyways to try?

Have some Tuff 1's which i tried but no joy there...  They are the bolts that started to rethread the axle...  I have one good nut, which i have checked on both sides now, (and has rectified the cross thread)

Can i get nuts from a hardware store to fit??


 

Title: Re: Wheel nuts... different threads? Help...!
Post by: Bob_Acid on May 11, 2009, 03:08 PM

I'd try local bike shops first.

Title: Re: Wheel nuts... different threads? Help...!
Post by: teamsano on May 11, 2009, 10:52 PM

coaster brake axles have a differing thread to regular axles.

24tpi vs. 26tpi or something like that.

i've also had suntour hubs (iirc) that i couldn't get wheelnuts to fit.

Title: Re: Wheel nuts... different threads? Help...!
Post by: hhp802n on May 12, 2009, 08:40 AM

Quote from: teamsano on May 11, 2009, 10:52 PM

coaster brake axles have a differing thread to regular axles.

24tpi vs. 26tpi or something like that.

i've also had suntour hubs (iirc) that i couldn't get wheelnuts to fit.

Thanks for the heads up... but where do i get them...  Fleabay?

And does anyone know if i need 24 or 26 tpi?

Title: Re: Wheel nuts... different threads? Help...!
Post by: telelogic on May 12, 2009, 11:33 AM

I bought a thread gauge from ebay for about 3 quid.

found that my skyway coaster set has 26t up front and 24t on the coaster hub :D

I think rini has what you need, you just need to find out what that is ;)

http://rinienterprises.com/

Title: Re: Wheel nuts... different threads? Help...!
Post by: hhp802n on May 13, 2009, 11:47 AM

I'll give it a go...  thanks

Title: Re: Wheel nuts... different threads? Help...!
Post by: BrianP on May 13, 2009, 12:47 PM

Suntour coaster hub axle was 24tpi, and the ACS freecoaster conversion kit which was available in the 80's had two versions - one to fit shimano coaster hubs and one to fit bendix and suntour coaster hubs.

This kit included a new cone nut to work with the replacement coaster driver so that would mean that your bendix coaster should have the same threads as a suntour coaster, which would be 24tpi...

hopefully! ;)

Brian  :daumenhoch: