This week, Lennard Zinn answers questions about bike positioning and shimmy
Lennard Zinn answers questions about installing disc brakes, inter-brand combinations for hydraulic brakes, and more on high-speed shimmy
Lennard Zinn takes a new look at the old problem of brake chatter in cyclocross.
Torque wrenches and temperature ranges Dear Lennard, I own both deflecting beam and click-type (Giustaforza) torque wrenches. They are stored in my garage where the temperature can get below freezing in the winter and over 100 degrees Fahrenheit in the summer. Do torque wrenches need to be stored and used within a certain temperature range to maintain accuracy? Gary Answer from Effetto Mariposa:
Side steppin'Dear Lennard,Regarding your April 10, 2007 article "Whatis it?", I was wondering if you had any thoughts or opinions on modern-daypedal systems which are attempting to bring the ball of the foot directlyto where the pedal spindle typically is. The two that cometo mind are SideMount pedal (SMP) of Pasadena, CA and VistaMagic X of France.DavidDear David,I have not used the Vista Magic X, but I’ve used Steve Lubanski’s SideMount Pedal and Tom Slocum’s HighSierra dropped pedal built into a Speedplay. Both of them feel absolutelyfantastic to pedal with; most riders would be amazed
Water SolutionDear Readers,It seems that whenever it is raining somewhere in the USA, I get questionsabout drain holes in the bottom bracket and rims. In the past, I have advisedpeople to drill their own if they are not present, but of course that isat great risk of voiding their warranties. However, here is a solutionthat might appeal to those whose bikes are filling up with water as wellas for those who do not want to void their warranties.LennardDear Lennard,I recently discovered it's not difficult to drill a hole down the centerof the set screw that holds the cable guide in place
Savings options? Dear Lennard, My question is regarding CO2 inflation cartridges. Is it okay to use CO2 cartridges that are labeled for use in BB guns and paint ball guns? I have been told that they contain a small amount of oil in them and because certain oils or lubricants can sometimes breakdown rubber that I should not use them. Is this true? These CO2 cartridges are sold at your local Wal-Mart or sporting goods store and are considerably cheaper. A box of 15 or 20 usually runs around 10 dollars as opposed to three or four dollars a cartridge at you local bike shop.
Screeeeeetch!Dear Lennard,I have a brand new Santa Cruz Blur equipped with Avid Juicy 7 discs. After a few rides in dry weather where the brakes performed flawlessly and silently, I rode the bike in the rain. I almost had to abandon braking altogether and just drag my feet to stop as the squealing sound was so loud it was shaking out my fillings. Since then, even in dry weather, the brakes continue to squeal on and off, and frankly I am afraid to use them in the wet again. The brakes are properly installed and bled. Did I not break them in long enough (three rides of easy road riding with