Lennard Zinn picks the brains of tubeless tire makers after a reader experiences an untimely double flat with a bead failure
One reader asks why, in the world, is his mechanic dripping oil into his bottom bracket and hubs whenever he has a little friction
New 55mm aero wheel can be used in either a clincher or tubeless setup
This week, Lennard Zinn answers readers' questions about the size of cassettes and cranks, rubbing chains, and more
Lennard Zinn answers reader questions on converting to tubeless, high thread-count tubeless tires, and treating carbon wheels with ceramic brake tracks
Zinn on mounting ’cross tires with Stu Thorne's Belgian tape, limiting Morton's Neuroma pain, and dangers of running clinchers tubeless
Tech editor Nick Legan answers questions on thin bar tape, bang-for-buck upgrades and tubeless safety
Also: seating tubeless, CDI torque wrenches and wider road rims
Lennard takes questions on electric tire pumps, hanging bikes form hooks and gets more feedback on road tubeless
Technical FAQ with Lennard Zinn: More feedback on tubulars and tubeless, pedal threads and fork fatigue
Lennard gets more feedback on tubulars v. tubeless, plus answers questions on fork fatigue, inner-tube fatigue, pedal threads and more
Lennard takes Q's on aging tubulars, tubeless tire maintenance, tire pump gauge accuracy and more.
Tubular vs. tubeless for the pros; getting that special bike
Vibration relief, wide-range gearing options and nano health
After a decade of tubeless innovation for mountain bikes the guys at Stan’s notubes turned their attention this year to wheels for road and ‘cross.
Going tubeless — even on standard rims with non-tubeless tires — is a good alternative to the hassle of tubulars.
Lennard takes some more questions about cyclocross brake shudder, tire choice and sealant.
Challenge Grifo Pro
Price: $14 to $30 Sizes: 250 to 1000 milliliters Web site: www.cantitoeroad.com Caffelatex is a new kind of tire sealant that foams as a means to better coat the tire with sealant. The makers of Caffelatex believe their trademark "ActiFoam" causes the sealant to foam when ridden or shaken, thus completely filling the tire cavity with sealant. In turn, the foaming action should help to keep the tire beads sealed and assist in sidewall puncture prevention.
Dear Lennard, I am considering storing my new full suspension bike using a vertical type rack that stores a single bike hanging vertically from the wheel. I was wondering if that could cause any damage to either suspension, front or rear. Does it make sense to hang the bike from the rear wheel? Nir Dear Nir, Hanging it from the front or rear wheel will not hurt it unless either of your shocks leak oil through the upper seals. In that case, hanging it could still be a good thing, because it will alert you to the problem and motivate you to fix it. Lennard
Polishing scratched aluminum cranks, tubeless road tires and Scotch-brite pads
I saw photos of it during the Tour, but can't tell what the model name of the San Marco saddle pictured on Robbie McEwen's Ridley is.
Kito Dear Kito,
It’s a Selle San Marco Regal, nice retro-looking saddle due to its big brass rivets around the back edge. Yet it has a nylon base, foam padding and a cover, just like most modern saddles.
What ever happened to silk (seta) tubulars?
Michael Dear Michael,
I have received so much mail about the " tubulars vs. clinchers rolling resistance debate that I could not resist running some of the better ones. The debate may never end, but your letter sure have raised a lot of issues that I’d never considered.
Tubes, tubulars or NoTubes?
I'm currently running Campy 10-speed and am interested in running Hutchinson Tubeless Tires. It appears that the only officially approved system is the Shimano Dura-Ace wheelset, which is obviously not an option for me. My question is will a wheelset with rims that do not have pierced spoke holes on the interior (like the Mavic Ksyrium SL, Campy Shamal Ultra or Fulcrum Racing Zero) suffice and is there anything special that has to be done to make them work?
More than 30 years after company founder Mike Sinyard brought the Specialized Turbo to market as a high-performance clincher, the Californian company is releasing another Turbo. This time, it’s a tubeless road model. Not yet available, the Turbo Tubeless was designed in conjunction with the tubeless Roval wheel that Specialized will sell. Weighing in at 290 grams, the S-Works Turbo Tubeless model features a supple 127tpi casing and, thanks to the lack of a tube, very low rolling resistance. Other models will be available later in the year.
After racing the final 22 kilometers alone, off the front, Francaise des Jeux rider Philippe Gilbert crossed the finish of Omloop Het Volk last week in victory. It was the second Het Volk win for the Belgian; his first came in 2006. The 2008 win was special to two of his sponsors and was a milestone for road technology, because Gilbert crossed the line on a tubeless wheel and tire.
Boulder, Colorado didn’t get a USGP this year, but Chris Grealish and his team of Boulder-Denver Couriers put on a weekend of UCI ’cross racing that rivaled the best of the series. Crowd estimates were put over 2000 and CrankBrothers even made the trip out to set up a tent in the venue and do some racing. Since it’s more than midway through the domestic season there are not too many unseen tech’ secrets, but we spotted a few new items, mostly in the form of tires.Click Image for Full Gallery
Most of today's column is devoted to a selection of the many, many interesting letters I got in response to my June 26 column, addressing the many factors that add to - or reduce – rolling resistance.
Dear readers,I’ve been wanting to write about rolling resistance for years, and I’ve had ongoing e-mail conversations with a number of you on the subject. Indeed, I’ve built up enough of it to compile a collection of some of the most interesting.Lennard WaterDear Lennard,As I was riding though an unexpected rainstorm, I noticed that, even with the rain, it seemed to take less effort to ride on the wet road than when it is dry (all other things – especially wind and temperature – being constant). I know that there is less friction when it comes time to stop or to turn. Could it be possible
The first big mountain-bike race of the season isn't just a chance to see which racers have been following their off-season training programs — it's an opportunity for gearheads to gauge which manufacturers have been doing their homework. For most companies, design, prototyping and testing generally take place one, two, even three years ahead of production. So the racecourse is one of the best places to get a look at what may be coming down the production pike. At this week’s NOVA National at McDowell Mountain Regional Park in Fountain Hills, Arizona, there were plenty of
Ask your average die-hard cyclo-cross fanatic to comment on the burning social, political or economic issues of the day and you may not get much of a response. Ask, “Tubular or clincher?” and you’re bound to get an earful. Of course, much of what you hear is as likely to confuse as to enlighten. Old-school Euros will, without a doubt, defend their motto, “Tubulars or death!” North American racers with a mountain-bike background will thoughtfully explain that the tubular's advantages can be matched by superior rubber technology and the advanced tread patterns of today’s clinchers. No
Until recently I had forgotten how much fun it is to just get out and ride for the sake of riding. Over the past 10 winters (give or take a few) I have been logging mile-upon-mile, all in the name of establishing a good base to support my body throughout the next six to eight months of torture it would be put through racing. You see for the last 15 years, right up until about 8 months ago, I was working hard to be a professional cyclist. In some ways I made it, and lived a small part of the dream I had been chasing. I have raced in the pro-class at NORBA Nationals, and I have stood atop
So what’s up with tubeless tires these days? A fair amount, actually. There are now three teams riding tubeless road tires at the Tour de France. As in the past, teams that have both Mavic and Hutchinson as sponsors are in a position to use them, but now, teams that have both Shimano as a wheel sponsor and Hutchinson tires could ride them as well. Shimano, it seems has joined the group of companies sharing the technology and working together on the project. That group is now Shimano, Mavic, Hutchinson and Michelin, but no Michelin-sponsored teams are racing on them. Mavic’s Chris Zigmont
Replace those face-plate boltsDear Lennard,I have heard that 3TTT has recalled their Zepp stems. I have an XL version of this stem – how can I find out if it is on the recall list? Can you tell me more about the problems associated with the stems? Should I pull this puppy off the bike?William Dear William,Yes, there has been a recall of those stems. You do not necessarily need to remove it from the bike, but you must replace the face-plate bolts with longer ones.Lennard Wippermann chain with Dura-Ace?Dear Lennard,I’ve got a Shimano 7800 drivetrain on my Seven Elium. In your most recent
Dear Lennard,Aargh -- so much about getting UST tires on the rim (seelastweek's Technical Q&A), now what about some help with getting themoff!?!? I mounted my tires pretty easily, but I just bought some Stan's andneed to yank them off again to install the Stan's. And I can't for thelife of me get them off. Any help?Philip Dear Philip,The first thing you need to do is to deflate it completely. Starting opposite the valve, push one bead inward with your thumb sothat it drops into the rim valley all of the way around. That reduces thecircumference it encompasses when you push it over the
Dear Lennard,The question is simple enough: What is the quickest/best way to change/fixa tubeless tire? While I love the ride characteristics and generally betterflat resistance of tubeless, fixing a flat--when it eventually does happen-orsimply swapping tires for another tread pattern is nothing short of anordeal. Skinned knuckles, broken tire levers (which you're not supposedto use anyway) and at least a half-hour's worth mano-a-rubber WWF styleaction seem to be the minimum commitment. On a recent ride, a friend who used a tubeless sealant nicked his sidewallon a sharp rock, adding a
Here's a quick update on my earlier reporton Michelin’s announced plans to begin testing its tubeless road tiretechnology.I also wanted to thank all those readers who sent in additional questionsfor me to ask Michelin’s Steve White when I finally managed to corner himon the phone. As luck would have it, White called me early this morningto clear-up my questions.The following is an edited transcript of our discussion: VeloNews: Steve, how easy will it be to seat and inflate a tubelessroad tire? I’m also curious how regular riders might be able to patch andreinflate tubeless road tires out in
With our 2004 Buyer’s Guide entering the critical home stretch, I was hoping I’d be able to dodge this week’s Tech Report, but this press release from Michelin was too important to overlook. As rumored for the past three years, tubeless technology is officially making the crossover to the road. Here are some excerpts from Michelin’s release: Michelin is initially targeting the world of professional road racing in 2004 with three new products: the Michelin Pro Race Tubeless, the Michelin Pro Grip Tubeless and the Michelin Pro Grip Special Paves Tubeless. This year, Michelin-sponsored