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#1
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DIY REAR RACK MOUNT
DIY Rack Fix and Rack Seat Tube Mount
I built a wooden rack over the standard $11 LBS rack: 8 ½" wide top by 24" long of ½" ply with two bag shaped ply sides going down to the rack eyelets and there bolted to with rod cut from 6mm grade 8 capscrews. The sides are relieved with oblong holes accepting shock cord hooks with teeth raised above the main deck for rope loop stanchions and are braced to the main deck with 2x2' cherry cut from a wooden skid/pallet. The aluminum rack seat stay end snapped during a loaded rack Conti TT test during the second swerve as the rack was headed east while I was headed west. The aluminum base stayed but the main deck was now supported by a nice piece of cold steel strap about 3/32x2x6" shaped to angle down to the seat stays where two piece spring clamp, one piece on each side of the stays with a fitted ½"ply in-between bracing the plates main surface beyond the stays with each plate having four fingers bent back to the stays-two each side-then bolted thru the main surfaces middle and off course that strap recovered from the bumper ofn an ancient cemetery mower. Sometimes a drawing wud do it right but who wants to look at… So that bracket cracked thru the bolt hole in the aforementioned chain stay flat plate. Enter THE FIX! Good for a starting point on a DIY rack or as a repair for an existing rack that can be eyeballed for a 8 ½" x ? ply main deck. True Value Hardware carries a ¼"x3 1/2x 4 ¼ U-clamp, two (get three) nylocks to fit, and several stainless washers in metric. Paint with Rusto. Allow to harden. Salvage a steel frame with cable guides. Cut the top tube at just above the guide and somewhat below (using oil on the hacksaw blade off course) after measuring and gauging the u-bolts position from the rack's seat stay clamp or! angle iron (in light alloy) bolted to the main deck and drilled beforehand to accept the u-clampto the seat tube where the u-bolts curve will fit around half that salvaged pipe(protecting the tube) that butts up against the existing seat post/top tube lug while the u-clamp butts against that salvaged cable guide. Works good! Instant repair or starting point. A third piece is a u channel bolted to the angle iron by the u-clamp and itself screw up thru the angle and the main deck. The channel gets side cut and then bent over to the DIY ply rack's side plates as a triangle brace. Weld shut if possible ($10?) maybe with a flat triangle over it on the bottom side as an angle brace. see also in techDIY touring bags |
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#2
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From: (g.daniels)
Message-ID: Enter THE FIX! Good for a starting point on a DIY rack or as a repair for an existing rack that can be eyeballed for a 8 ½" x ? ply main deck. That's what I call creativity! Why 8 1/2 inches? Do you carry letter sized paper? Yours, Doug Goncz ( ftp://users.aol.com/DGoncz/incoming ) Student member SAE for one year. I love: Dona, Jeff, Kim, Mom, Neelix, Tasha, and Teri, alphabetically. I drive: A double-step Thunderbolt with 657% range. |
#3
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that width gives a slight inward rack side plate angle going down to
the dropout's rack eyelets and holds 3 food cans side to side. Corner blocks are planed to that angle. the rack is in daily use for five years recommend fender washers at the dropout eyelets both sides, possibly drilling the fenders for small wood screws so as to spread the load. So far, no need for steel sleeve inserts to bush the 6mm dropout sideplate bolts. but that's a piece of '58 ply salveged from a countertop. |
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