wheels

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The Fulcrum hoops responded as quickly as a 29" wheel ever has for me

Lennard Zinn answers more questions on bike weight and readers weigh in on previous columns

We look through the pits in Milan for the wheel and tire combinations chosen by many of the teams in the final-stage Giro d'Italia time trial

Our tech editor answers questions on bottom bracket height, pressure gauges, budget wheel choices and balancing your hoops

Also, bottom bracket paranoia and feet rubbing on the crankarm

Also: draining water from rims

Zinn addresses reader questions about repairing a blown derailleur hanger, shipping carbon seatposts and whether GC riders need aero wheels

This week's tech roundup also includes: SRAM mountain bike derailleurs, Wheels bottom bracket adapters, SRAM Red, Shimano patents and Friday flicks

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So far 96 models have been approved, and 43 more are currently being examined

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A look at Mavic's Ksyrium SLR Exalith wheels: stealthy looks, great braking, but can howl like a bee-stung toddler.

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LZ rides up stream in a gully washer, then finds mad fibers and happy rims

Pre-built, disc-brake-compatible, high-end, deep-section, cyclocross wheels from Reynolds. No-kidding.

Easton comes out with an affordable aluminum-rim tubeless road wheel. Plus some more new goodies.

NIck Legan takes a look at some new wider wheel designs from Bontrager and Zipp. Plus a look at some special brakes that work on the wider rims.

Carbon tubulars are excellent in gusty conditions and less expensive than the comparable Zipp 303

Light carbon climbing wheels at a good price

One of the most impressive items that Giant has launched for the 2012 model year is its new WheelSystem.

Mavic has vastly improved XC, trail and all-mountain sets in their venerable Crossmax line.

A whole new take on fast wheels: ENVE may have just changed the way we think about aero wheels.

The Speed Dream Tonazzo carbon clinchers: light, stiff wheels from an artisan.

Think the Haven Carbons are tough? Don't discount Easton's EC90 XC

This week Lennard is devoting his column to a profile of Rich Sawiris and a look at his wheelbuilding techniques.

Check out CyclingTips's author page.

Nick Legan puts a pair of Mercury carbon clinchers to the test.

Nick Legan takes us through Zipp's factory in Indianapolis.

A look at Easton's new EC90 Aero 58mm carbon clincher

A reader wonders why deep-section carbon rims are so popular in the most non-aerodynamic discipline in cycling.

Lennard Zinn takes a look at some new products for the installation, removal and inflation of tires, plus a quick look at new wheels for wider (read cyclocross) tires, from HED and Mondo.

New wheel designed from DT Swiss, Rolf Prima and Ritchey

SLIDESHOW: Sun Ringlé has licensed the rights from NoTubes.com for its patented low rim wall design to beat burping.

Check out Zach White's author page.

A reader wonders whether cyclocross tubulars have an inherent weight limit, or if bigger riders can also take advantage of the benefits of the best tire choice

More spokes than you can shake a stick at. New 'sets from Zipp, Reynolds, Hed and Lightweight and others

Ah, the pain and joy of testing time trial gear. Zack Vestal installs and rides Zipp's Vuka R2C shifters and VukaShift aero extensions.

Wheel guru Eric Hjertberg is back with a wild-looking carbon wheel.

As options in carbon clincher wheels continued to proliferate in the last few years, Zipp appeared to stay on the sidelines. No more.

There was so much new equipment introduced at Sea Otter that it will take a few columns here to do it justice.

A word of warning: Don’t test ride Zipp’s 303 tubular wheels. If you do, you’ll be compelled to buy them.

Check out CyclingTips's author page.

We can barely keep pace with the ongoing roll out of new cycling products. Fortunately the manufacturers are telling us about gear that’s available in bike shops right now (or very soon), so you can get tricked out and on the road for spring pronto.

From DH and freeride to cross-country, Easton wheelsets will get put through their paces.

A reader asks tech guru Lennard Zinn if a 650B bike doesn't work out, can 26-inch wheels work on the rig instead?

Call yourself a clydesdale and are worried about your 29er wheels turning into tacos? Singletrack.com's Lennard Zinn says there is safety in strength.

The 2010 Time catalog includes not just bikes and pedals.

Stan Koziatek's garage invention has earned one of the best compliments possible: "Stan's" is now the generic term for tire sealant, in the same way the brand name "Xerox" means "copy" and "Kleenex" means "facial tissue." He's at it again for 2010.

Check out CyclingTips's author page.

Is it OK to file off 'lawyer's tabs' on mountain bike forks?

Can mis-aligned rear dropouts cause rear wheels to pull over?

How can I stop my rear wheel from slipping in the dropout?

What road wheels do you recommend for a 250-pound rider?

Why does my tubular tire thump near the valve stem? - Feedback

Why does my tubular tire thump near the valve stem? I have ridden them several times and I have noticed a significant pulsation whenever I coast at 20-28 mph. I don't notice it when I am pedaling although it is probably there.

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Dear Readers, Well, I just got back from Sea Otter, and I’m sure you’ve read my review of the SRAM road group. There were lots of other cool things there, including pieces of the new XTR and lots of new mountain bike stuff from SRAM, Avid,Hayes, RockShox, Fox, Magura, Cat Eye, and many others. But one thing remained the same – my mailbox filling up with letters on the subject of wheel rotational weight and what difference it makes when climbing. The first time around, I published a letter saying it made almost no difference. The next time we revisited, I published letters saying it was a big deal.

Dear Lennard Zinn;Is it true that the Zipp clincher 404/303s will break up when tire pressure exceeds 140? --JV Dear JV;Below is a long answer to your question, but it is worth reading, as it addresses, in addition to the specific Zipp question, the general question many of us have about how much pressure a clincher rim can handle.--Lennard Answer from ZippDear Lennard and JV;In short, no, a ZIPP 303 or 404 clincher will not break up when tire pressure exceeds 140psi. The source of this concern may stem from one or both of two sources: either from the Maximum psi sticker ZIPP now applies to

VeloNews technical writer Lennard Zinn is a frame builder, a former U.S.national team rider and author of several books on bikes and bike maintenance.This is Zinn's regular VeloNews.com column devoted to addressing readers'technical questions about bikes, their care and feeding and how we as riderscan use them as comfortably and efficiently as possible. Readers can sendbrief technical questions directly to Zinn. We'll try to print a representativesample of questions regularly.First, some follow-up from previous columns:Comment on rim weight:Froma July, 2002 column,"As an aside- the old wheels

The image of Tyler Hamilton crashing at the bottom of a key descentas the Giro d’Italia’s other main contenders is firmly emblazoned inthe minds of anyone watching OLN’s coverage and saw that loop of tape played over and over. Coming through a turn, Hamilton stood up onhis pedals and suddenly lurches forward and hits the ground. Hamilton stated in his diaryon velonews.com that the freehub had not engaged when he stood on thepedals, causing the crash. The pain he had to deal with with over the remainderof the Giro is well documented, as is the amount of time he lost on mountaintopfinishes

VeloNews technical writer Lennard Zinn is a frame builder, a formerU.S. national team rider and author of several books on bikes and bikemantenance. This is the third of Zinn's weekly VeloNews.com column devotedto addressing readers' technical questions about bikes, their care andfeeding and how we as riders can use them as comfortably and efficientlyas possible. Readers can send brief technical questions directlyto Zinn. We'll try to print a representative sample of questions eachThursday.First, some follow-up from our last columnA few more reader comments on the creaking bottom bracket

There are four different colors of Treks you will see U.S. Postal racing on in the Tour. These are two different road bikes and two different time trial bikes. The two road frames you can buy, and there is no difference between them and models sold in bike shops. The two time trial frames are strictly team issue. This use of stock frames is unique at that level of racing. Almost all top riders have frames custom built especially for them, often by a manufacturer other than the one whose name is on the frame. In fact, Trek claims that Lance Armstrong's two Tour victories were the only ones

In addition to the teams mentioned yesterday, Kelme is also using wheels with carbon braking surfaces – namely Shimanos with carbon rims. Like Shimano’s aluminum wheels, they have paired spokes with their heads in the side of the rim and nipples at the star-shaped hub. Kelme uses Shimano’s red cork brake pads with them. ADA also makes a rubberized cork pad for carbon rims that are claimed to provide consistent braking on carbon rims, even when wet. Its pad fits in both Shimano and Campagnolo brake-pad holders, but not in Corima pad holders. Telekom has been using ADA pads in the past but

The wheels are arguably the most important part on a bicycle and are thus the source of constant efforts for improvement, and, for a team, to find an edge over, or at least parity with, the other teams. There are a number of physical properties of a wheel that teams have to consider. A gram of rotating weight out at the rim is worth about two grams on the frame, so weight reduction is obviously critical. Wheels are big egg beaters of the air, and any reduction in their aerodynamic friction can pay off, especially when the rider is not sheltered in the peloton. In order that the rider can