Caliper update question
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Road Master
Joined: May 2014
Posts: 825
Likes: 59
From: Canada
John, the 'diameter' of the axle is dictated by the bearing size. So your bike with 3/4" ID tapered roller wheel bearings uses an axle of that OD size, however that is only the diameter where it passes through the wheel. One end is larger than that, the other is smaller.
Later bikes have either 1" bearings or 25mm ones, but the two axles of those sizes will both fit the later sliders, because the 'big' and 'small' ends of those axles are the same sizes. I suspect the 'small' end is the same for your earlier bike as well. What we need is someone to tell us if the 'big' end is the same size as later axles.
In any event either a 1" or 25mm axle will have enough meet on it for you to make any alterations to it, so it fits your 3/4" wheel.
Later bikes have either 1" bearings or 25mm ones, but the two axles of those sizes will both fit the later sliders, because the 'big' and 'small' ends of those axles are the same sizes. I suspect the 'small' end is the same for your earlier bike as well. What we need is someone to tell us if the 'big' end is the same size as later axles.
In any event either a 1" or 25mm axle will have enough meet on it for you to make any alterations to it, so it fits your 3/4" wheel.
Thanks that helps.
Road Master
Joined: Jun 2007
Posts: 842
Likes: 47
From: New Hartford CT
OK, this may seem to be a stupid question, but I'm going to ask anyway. All this talk of going to the newer brake setup requires a lot of new parts, from the new lowers to the new calipers, rotors, axle and possibly the wheel itself.
Is there another way to increase the front stopping power on an older Evo (an '89 FLHTCU in my case) using the existing fork and wheel setup? Does someone make calipers/rotors that fit the old forks that will provide significantly improved braking?
Is there another way to increase the front stopping power on an older Evo (an '89 FLHTCU in my case) using the existing fork and wheel setup? Does someone make calipers/rotors that fit the old forks that will provide significantly improved braking?
Club Member
Joined: Jun 2007
Posts: 45,429
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From: Bedford UK
Yes there are bolt-on alternatives, such as PM calipers and even larger diameter rotors, but most of that stuff is only available new, hence expensive.
Road Warrior
Joined: Apr 2007
Posts: 1,952
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From: Senoia, Ga., by way of Miami, Fl..
The big end of the 1" axle is 1.120", no step down.. The left side was still 3/4", the right side was the main difference, plus the caliper mounts of course.. So, if you're going with '00-up lowers, the 1" and 25mm axles will be the same except for the section between the legs.. With the lowers, you could go with either the '00-07 calipers and factory rotor for '86??-'07 or Brembo's with '08-up rotors.. Hope that helps.. As for the line, I cheaped out and used a new take off that came with the calipers, more nylon than rubber, great feel to them..
On a side note.. My Dyna has the '00 lowers and caliper, stock rotor and caliper ('96) and stops MUCH better than factory.. Dressers changed the axle earlier than the other bikes, I think the Dyna changed in '04, but dont quote me on that..
On a side note.. My Dyna has the '00 lowers and caliper, stock rotor and caliper ('96) and stops MUCH better than factory.. Dressers changed the axle earlier than the other bikes, I think the Dyna changed in '04, but dont quote me on that..
Last edited by HGM; Jul 8, 2014 at 02:17 PM. Reason: Fixed a date
Outstanding HDF Member
Joined: Mar 2010
Posts: 2,543
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From: Chicagoland
What model bike was the '06? The touring bikes didn't get Brembos until '08.
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