What Grant is telling us is: If you are running the Mark's Rack, try hard to keep the weight of the cargo on the mark's rack to 4.4 lbs or less. If you are running the Nitto Mini front rack, try hard to keep the weight of the cargo on the Mini Front Rack to 13 lbs or less. If you are running the Nitto Big Rear Rack, try hard to keep the weight of the cargo on the Big Rear Rack to 44 lbs or less.
Gallon of milk on the Mini Front Rack is no problem, because 8lbs is less than 13lbs. Gallon of milk on the Mark's Rack is pushing it, because 8lbs is greater than 4.4lbs. My understanding of what Nitto does is that they do a very vigorous shake test with that load. If it passes the shake test for that load, then they recommend that load. That's why it's in lbs, and not in force - amplitude - frequency - cycles etc. Even though the Nitto test in actuality is in force, amplitude, frequency, cycles. An Engineer might like those numbers, but it's hard to take that into the real world. On Thursday, February 28, 2013 3:15:13 PM UTC-8, Michael Hechmer wrote: > > I can't make any sense out of these rack weight numbers. Rack weights are > not calculated in lbs. A gallon of milk weighs 8 lbs., which is a lot for > a mini front rack, but I wouldn't expect the rack to break. What are you > telling us? > > On Thursday, February 28, 2013 11:37:52 AM UTC-5, grant wrote: >> >> Mark's rack is 4.4 pounds. >> Nitto Mini, 13. >> >> The big rears, 44. >> >> Nitto is conservative, but try to heed these. The racks are well made of >> good materials, but are not unbreakable...even tho they're CrMo and Nitto >> and sold by us. Doooooo be careful, and if you put a basket on a Mark's >> rack and use it for milk--I mean, if you cannot be talked out of that, then >> lift the load off the rack with straps to the handlebars front and rear, >> making sure the load is lower than the bar, so that cinching the strap >> doesn't impose a downward force on the load and multimply the stress on the >> rack. >> Check bolt tightness. >> The specs come with racks now, and are on the sight. >> >> Be careful, safe, and aware. >> > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
