I teach a class for up to ten people.We use Jobst?Brant's book to describe how to measure?ERD Effective?Rim Diameter,?hub flange holes, and flange to center of hub.?We like to use Gete Gray's?Spoke Length Calculator?http://www.houseof3d.com/pete/applets/wheel/appwheel.html?.?We prep rims with antiseize in citys that have salted streets or ocean salt, We prep rims with grease in desert communites. Spoke thread prep?is recommended too.?Reducing friction?on the nipple?and reducing crossion friction allows easier adjutment, higher spoke tension without damaging the nipples. We start with a lacing circle, the group sit with up to five people around one rim and learn how to lace a wheel.?Afer they have done it?in a group then they try?lacing on their own wheels. We start with one spoke thread showing, tension spokes evenly up to 60 KGf. Working at low tension (60KGf) allows one to work safely on round dish and true. Once the wheel is complete at low tension we bring it up to full tension half a turn at a time. We have an orignal Rolf Wheel Prestress Box. Putting a spoke tension meter on a spoke we bring the tension up to 150 KGf. at this hight tension the spoke elbo's change their 90 degree angle and?seat into the hub flange, nipples seat into the rim. You will notice that the tension on?a new spoke/hub/rim?wheel drops between 10 and 15 KGf after pre stressing. Add tension back into the spokes and use a dial indicator to inspect final round and true. we have modified Park TS-2 stands to work like TS-3's. We also have a TS-3.?? This is a quick over view of the class, If you need details, send me a note.
Christopher Wallace Holistic cycles
Hi Rich,
Why not do both, depending on what the student can afford??
We did a couple of a free wheel building classes for our volunteers using parts that were lying around.? One way to avoid problems that might crop up with used parts is to have the students deconstruct a wheel prior to the class.? That way they will be working with all the parts from the same wheel thereby reducing any potential problems.
Good luck with the class!
--sam
On Tue, Jun 23, 2009 at 4:27 PM, Rich Points rich@communitycycles.org wrote:
Hey All, We're developing a wheel building class here at Community Cycles.? We have a rough idea of what we'd like to do but we could use some help smoothing it out.
We're thinking the class would be three 2 hour sessions at a cost of $X to 6 - 8 students.
We've thought of two ways to go about supplies for the class. One would be to use recycled rims, hubs, nipples and maybe spokes.? Another way would be to buy the parts from our wholesalers.? The latter option means we could have control of what the class is working with.? The former option could mean a lot more on the fly problem solving for the instructor and class but it'd be a lot cheaper for us and our students.? I'm leaning towards the new parts option because I think it'll provide the highest quality of instruction.? What do you guys think?
Another question we're trying to figure out is what happens to the wheels that get built in the class.? At our shop we're always in dire need of 700cc wheels.? So we're thinking the class could build 700 wheels and they'd be used by the shop.? However people taking the class may want to build wheels that they'd keep as their own.? If we structure the class to just build 700 fronts we have more consistency and control.? If we let folks build wheels for their own projects the class might have more general appeal but presents logistical and supplies hurdles.
Please let us know how your shop is teaching wheel building.
Ride On!
--? Rich Points Community Cycles Director http://CommunityCycles.org Rich@CommunityCycles.org 720-565-6019 (W) 303-589-0597 (C) Donate your old car to Community Cycles http://communitycycles.org/get-involved/donatecar.html Make your ride count! Register for Bike to Work Day June 24, 2009 http://www.drcog.org/btwd2009/index.cfm?page=Register
Thethinktank mailing list Thethinktank@bikecollectives.org To unsubscribe, send a blank email to TheThinkTank-leave@bikecollectives.org To manage your subscription, plase visit: http://lists.bikecollectives.org/listinfo.cgi/thethinktank-bikecollectives.o...
Thethinktank mailing list Thethinktank@bikecollectives.org To unsubscribe, send a blank email to TheThinkTank-leave@bikecollectives.org To manage your subscription, plase visit: http://lists.bikecollectives.org/listinfo.cgi/thethinktank-bikecollectives.o...