2011 Triumph Rocket
Make/Model and Details of Sidecar Tub – Fibreglass, Aluminum (aluminium) Wrapped, Steel Sheet Wrapped etc
1975 Spirit Eagle Fibreglass Side Car
Sidecar Tub Design – Tandem/Single
Sidecar Frame Type and Measurements – (Square/Round Tubing, Aluminium/Steel)
Round Steel Tubing
Rear Mount Ground Clearance Measurement
Front Mount Ground Clearance Measurement
Motorcycle Sub-chassis Details (Square/Round Steel Tubing, Aluminum etc) and Attachment to Motorcycle (High Tensile steel, lock nuts etc)
Total Width of Combination Lean-in
Total Width of Combination Lean-out
Distance Between Sidecar and Bike
Sidecar Tire (tyre) Speed, Weight Rating
Sidecar Rim Details, Diameter, Rim Width etc
Suspension Type (Shock Absorber/Swing arm/Torsion) on Sidecar Wheel
Swing Arm Coilover Spring Shock Absorber
Pivot Attachment to Motorcycle, (Rose Bush, Heim Joint, Rod End etc)
Heim Joint Rod Ends
Sidecar Brake Details (if fitted), Drum/Disc, Plumbed to Motorcycle Rear or Front Brake Cylinder
Modifications/Adjustments During the Build
Photos of the End Product
I wonder who is enjoying the ride more?
What an amazing build.
Most leaners have the pivot mounts on the bikes centreline, your’s however appears to be off set toward the sidecar.
Perhaps you could write something for your page, to explain why you chose this, how it rides, whether this causes issues or performs well.
Anyway, amazing job and I can’t wait for some measurements, tube size, extra details etc. Have an amazing day. Dave
Hi Dave, yes I figured the non central line installation would raise an eyebrow.
But, from an engineering standpoint, if you follow the force vectors that apply from the sidecar to the motorcycle, the slight offset is relatively insignificant.
The majority of load is a huge moment/twist that pushes the rear tire to the left and pulls the front wheel to the right. That would be true for any sidecar. The real issue is the amount of lean that the Pivot Point has, so the lower the pivot points are to the ground, the better. I offset the front pivot mount further outboard than the rear pivot mount.
I don’t think that is a significant issue, though it does tend, theoretically, to toe in as the sidecar moves up and down over bumps, independent of the bike. I found no problems driving it.
I think the bigger concern is the frame and the attachment points, and whether the frame can handle the load. So it is more important to find the best way to transfer the load to the frame in the bike then it is to worry about getting in the Centerline of the bike.
Again remember the primary load is the big dead weight hanging off the right hand side of the bike: doesn’t matter where you attach it, the force vectors are the same. So I’ll be happy to draw up some diagrams about what I did.
I think the biggest issue I’m having with this ride is that the sidecar is designed for a much smaller bike and in order for me to connect it, I had to have the sidecar wheel further in front of the rear wheel than is optimal. That translates to more side load on the front wheel, especially when going slow with a load. I bet I could not resolve the geometry on the frame without significant modifications, which I did not want to do. But that is what you get with a 40 year old sidecar.
I know that’s a lot of explanation and I’ll be happy to type it up in a more cohesive fashion later. Thought you would like to hear my ramblings.
Also, really cool project page! Thank you so much. John
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Thank you for visiting Haul N Ride. Dave