#1
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rim repair tool!
went over to the next burrough for a flu shot before mass hysteria set
in: the superduper where the shot fest was held sent out a karate man who subtley bent muh CR-18 double wall 27" rim. not fixable, nor is the plight of the superduper vs. woolmort where i thus transfered all accounts. no rim bending machines on this coast sez local expert. well, i tugged, pushed, tried deep reach clamping, put it under the schoolbus front bumper and levered against the grill-uneven bars?-that has promise as a adjustable device. nuttin! as the last resort, i jumped on it. between two rectangles of junked countertop chip board covered with formica then back to the bus for a tweak. now yawl know what usually happens here, splat!! but no! the rim slowly came back into shape. jumpjumpjumpjump. i weigh 165. the double wall did not collapse:amazing! i have not tried this on other rim construction or materials-i assume ceramics... i now have two squares of 1 1/4" chip/formica.protect the formica, float the chip on tubas. trued the rim yesterday and itsagonnarunagin!yahhhoooo! |
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#3
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g.daniels wrote:
went over to the next burrough for a flu shot before mass hysteria set in: the superduper where the shot fest was held sent out a karate man who subtley bent muh CR-18 double wall 27" rim. not fixable, nor is the plight of the superduper vs. woolmort ----8----cutting vibrant text i now have two squares of 1 1/4" chip/formica.protect the formica, float the chip on tubas. trued the rim yesterday and itsagonnarunagin!yahhhoooo! Nicely written G.D. That's the way I feel when I get an impossible bike repair job done. Thanks for reminding me :-) /Robert p.s. every time I've flatspotted a ceramic rim, a piece of the coating has flaked off (Mavic OP Ceramic 32h/622). Twice, now. Next rim will not be ceramic, for this reason. |
#4
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now! the radial press corrector mod:
a circular insert/sandwich meat cut to yawl's rim inside diameter placed inside the lateral press previously inscribed can be developed to press out radial deviations from the perfect circle: the basic 2 way press solves the inherent DIY problem of holding the expletive deleted rim still in 7 dimensions while going to warp speed. this is conceptual: i have only tried cutting ply not particle board and my primitive sears saber saw is not up to it-the blade rides outward leaving a fairly good cut on the curved line but then wider at the ply's bottom side. a router will correct this. i am using 3/4 good both sides and maybe in the middle. both tools are bolt mounted on a trammel- steel strap bolted to the rim circle's center:search to woodworking or cabinet making cutting circles-trammel. cut the outside diameter first, then the inside. thought i'd mention this in passing. a cabinet shop could do the work but you formica. the edges can be formica then block plane the formica to less than the larger surfaces-for possible wear protection. possibly critical on the six sides of the circle/press 3 sided rectangle section lubeable with tefloned wax the more conceptual part-answered by the pro shop people in this cyberspace-how long a chord should the press section be cut to? like what's the average dent length in chord measure? i'd guess 12" would do it. from the circle, one would cut a 3 sided rectangle with the chorded circumference on the outer press working surface. above the junction or rectangular side nearest the circle's center, the fabricator would cut two '+' cut's wide enough for a slim wrench. everything up to this point exists for scrounging- but now we need a 2 section bolt that lengthens when unscrewed and then the DIY rim press!! there are such presses in existance, i 'm not the only one on the boat for sure but... comment is off course encouraged and suggestions for the bolt? and off course from those who tried it-does it work? |
#5
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search to: Fixing flat spotted rims ? in bike.tech
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