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Old 04-06-2014, 05:48 PM   #1
Prmurat OP
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Sidecar alignment on vintage bike?

Is it an impression or sidecar where more "backward" installed in the 40' than they are now? Is there a reason for this?
Like in this pic
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Old 04-07-2014, 07:42 AM   #2
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As I recall from some things I read when I first began designing my own rig, that has to do with a hardtail bike not being inclined (not being spring-loaded) to rise in the rear while turning away from the chair. So, no lead was needed. Or to word that differently: Think of a rig's tendency to roll to the outside during a turn away from the chair and how a sidecar wheel moved forward could help reduce that when a bike has a lot of travel in its rear suspension. I have a softail bike and only 3" of lead for the sidecar wheel, and I can easily lose traction at the rear tire during a hard turn away from the chair. As I understand things, more lead would improve that situation both by shifting sidecar weight to the front of the bike and by being more of an overall stabilizer.
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leejosepho screwed with this post 04-07-2014 at 08:06 AM
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Old 04-07-2014, 03:09 PM   #3
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Yes there are good reasons. On a rigid frame outfit the side wheel didn't need lead.
Sidecars frequently had doors in the old days, and designers appreciated having the side wheel further back...
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Old 04-07-2014, 04:36 PM   #4
Carl Childers
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The Indian above had a plunger frame that gave a few inches of rear wheel travel, not much but more the the Harleys of that era thatwere true hardtails.
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Old 04-08-2014, 06:45 AM   #5
Barnone
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Originally Posted by Prmurat View Post
Is it an impression or sidecar where more "backward" installed in the 40' than they are now? Is there a reason for this?
Like in this pic
Interesting that rigid bikes don't necessarily need lead.
BTW, great looking rig. Any more photos?
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Old 04-08-2014, 07:39 AM   #6
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Sidecar alignment on vintage bike?

Just because you asked... I should pick it up in a week; seats will be changed, stereo system in the trunk ditched and maybe some paint on the hand made car body.
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Old 04-08-2014, 10:59 AM   #7
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Somewhere I have a copy of an old HD manual that provides instruction for sidecar installation. Not only does it advise the axles of rear wheel and sidecar align, it also recommends lean-in rather than lean-out. If I can put my hands on it I'll scan the pages.
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Old 04-08-2014, 01:58 PM   #8
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MotoJ; it would be great... Damn! Another technique to learn ??
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Old 04-08-2014, 03:20 PM   #9
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Just because you asked... I should pick it up in a week; seats will be changed, stereo system in the trunk ditched and maybe some paint on the hand made car body.
That body's to pretty to paint!
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Old 04-09-2014, 07:00 AM   #10
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That body's to pretty to paint!
Yep, I'd have a hard time painting that work of art.
What a nice rig!
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Old 04-09-2014, 07:02 AM   #11
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Just because you asked... I should pick it up in a week; seats will be changed, stereo system in the trunk ditched and maybe some paint on the hand made car body.
Please start a separate thread when you get your new rig.
I am interested in your riding impressions.
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Old 04-09-2014, 07:03 AM   #12
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Originally Posted by MotoJ View Post
Somewhere I have a copy of an old HD manual that provides instruction for sidecar installation. Not only does it advise the axles of rear wheel and sidecar align, it also recommends lean-in rather than lean-out. If I can put my hands on it I'll scan the pages.
Please do. Thanks.That info needs to be posted in the design sticky.
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Old 04-09-2014, 06:41 PM   #13
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That body's to pretty to paint!
Ought to have the metal shaper make you some alloy tins for the Indian.
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Old 04-10-2014, 08:52 AM   #14
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Quote:
Originally Posted by MotoJ View Post
Somewhere I have a copy of an old HD manual that provides instruction for sidecar installation. Not only does it advise the axles of rear wheel and sidecar align, it also recommends lean-in rather than lean-out. If I can put my hands on it I'll scan the pages.
I have also heard they had some kind of adjustable, eccentric bearing setup in the neck to reduce trail with a sidecar attached.
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Old 04-10-2014, 12:16 PM   #15
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You mean something like this:
http://m.ebay.com/itm/271445865767


I am glad there is a girder on the Indian!!
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