What cup will fit better to my shova lt 2007. with 120 mm HT? how much will my offset be, considering my HT i is not the same size as predicted HT's?
Thanks.
Thanks.
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Anyone else get a new cup...Udi??
- Thread starter davep
- Start date
"What cup will fit better to my shova lt 2007. with 120 mm HT? how much will my offset be, considering my HT i is not the same size as predicted HT's?
Thanks."
The socom cups were designed around a 117.5mm HT so these would be the ones to go for - they should give perfect bearing life and alignment as the difference is only 2.5mm.
You would see exactly -1.5 degree, the ht length does not define the reduction of the angle - this is engineered into the cup and wont change - it is the offset that is calculated to the HT length - go too far from 120mm and the top and bottom cups wont align.
We have actually fitted cups designed for 117.5 socom to a 133mm HT with no problems so far though we expect shortened bearing life and there peraps is a little more 'tightness' when too much peload is added due to the alignment being a little off perfect.
Rick
Thanks."
The socom cups were designed around a 117.5mm HT so these would be the ones to go for - they should give perfect bearing life and alignment as the difference is only 2.5mm.
You would see exactly -1.5 degree, the ht length does not define the reduction of the angle - this is engineered into the cup and wont change - it is the offset that is calculated to the HT length - go too far from 120mm and the top and bottom cups wont align.
We have actually fitted cups designed for 117.5 socom to a 133mm HT with no problems so far though we expect shortened bearing life and there peraps is a little more 'tightness' when too much peload is added due to the alignment being a little off perfect.
Rick
Finally got my arse into gear and fitted the ready to ride reducer cups to my sunday, jesus fecking christ the E13 ones just did not want to come out!!
BB is now sitting a shade under 13.5 inch and the wheelbase has went from 44 and a half inches to 45 inches, unfortunately I haven't been able to measure the head angle yet.
Would be rude not to have some pics.
BB is now sitting a shade under 13.5 inch and the wheelbase has went from 44 and a half inches to 45 inches, unfortunately I haven't been able to measure the head angle yet.
Would be rude not to have some pics.
I don't think using this product a good idea.
If a bike have a certain HTA it is for a reason and the resistance is calculated arround that angle.
Just 1 degree slacker will put more stress on the HT junction, and while it may not break or crack very soon it may fatige the frame in a log term making frame usefull life shorter...
I would like to know what DW thinks about this, being him the designer behind the IH Sunday
If a bike have a certain HTA it is for a reason and the resistance is calculated arround that angle.
Just 1 degree slacker will put more stress on the HT junction, and while it may not break or crack very soon it may fatige the frame in a log term making frame usefull life shorter...
I would like to know what DW thinks about this, being him the designer behind the IH Sunday
It's a possibility I've considered but I'm not worried about it at all, for a frame like this I think your overthinking it a little. Besides how many broken Sundays have you seen, I've never seen one in the flesh and despite all of my many hours of forum geekery have seen two Knackered and heard of a few more. And anyway it's just a toy, they all get broken sooner or later 
Typed on my phone so sorry for any weirdness in spelling etc!
Typed on my phone so sorry for any weirdness in spelling etc!
I got a set of the -1* Sunday reducers from Ready to Ride Cycles and went about installing them myself. First step: get out the e13 cups, and as others have said above, that ain't easy.
Anyways, once that was done, it was pretty straightforward to get the news cups aligned and installed.
e13 cups: (with Boxxer WC's ('07) with 8.6" between the seals and the upper crown): WB 46.25, BB height 13.8.
reducer cups: (same Boxxer settings): WB 46.6, BB height 13.7.
Sorry, don't have an angle finder, but overall, the bike feels more stable while retaining its great handling. Two thumbs up!
Anyways, once that was done, it was pretty straightforward to get the news cups aligned and installed.
e13 cups: (with Boxxer WC's ('07) with 8.6" between the seals and the upper crown): WB 46.25, BB height 13.8.
reducer cups: (same Boxxer settings): WB 46.6, BB height 13.7.
Sorry, don't have an angle finder, but overall, the bike feels more stable while retaining its great handling. Two thumbs up!
As it's hard to measure, I just made a simplified CAD drawing considering an M size frame with Boxxer. 1° lower headtube angle will result in 64.2° steering angle instead of 65°. The BB should be 1.8 mm lower.
I made the drawing for 1.0° offset in the cups. They could also be produced in a way to result in 64.0° steering angle. Who knows?
Sorry, I forgot to check the WB and already killed the file...
I made the drawing for 1.0° offset in the cups. They could also be produced in a way to result in 64.0° steering angle. Who knows?
Sorry, I forgot to check the WB and already killed the file...
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if anyone want...
I still making offset cups for sell.
my is 2 years old and still work like new.
I'v allready sold alot to bikers all around the world.
the price is 100$ for a pair.
my sunday is 63 HA
you can see here sinc when I use it...
http://www.ridemonkey.com/forums/showthread.php?t=200133&highlight=angle+change
I still making offset cups for sell.
my is 2 years old and still work like new.
I'v allready sold alot to bikers all around the world.
the price is 100$ for a pair.
my sunday is 63 HA
you can see here sinc when I use it...
http://www.ridemonkey.com/forums/showthread.php?t=200133&highlight=angle+change
I would be concerned about this, but it seems more probable when you have a longer fork rather than offsetting the head angle with the indicated head set which would transfer loads efficiently on to the frame. Further more, I think DW could contribute, since he used cups likes these on sams frame a numerous amount of times from what I understand
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