Lennard Zinn

How many spare links is too many?

Different speed chains require different installation methods.

Getting to the bottom of a complex question about the fastest tire options.

Helmet and bike safety are on readers' minds this week.

Lennard Zinn answers more groupset compatibility questions and a couple readers provide some helpful updates to previous questions.

In this week's Technical FAQ, Lennard Zinn discusses riding while on anticoagulants.

How inter-compatible are different generations of Campagnolo components?

Zinn comments on WiFli RD capacity, shiftmates front and rear, Shimano hydraulic MTB/Road caliper compatibility, wire flats, and more.

Zinn comments on adaptations — like converting a hardtail to a gravel bike or using a "city" e-bike off-road.

Some tips and tricks for choosing an e-bike and getting the most out of it.

Can Shimano and SRAM's latest generation parts be interchanged?

Zinn dives into SRAM electronic groupset inter-compatibility and tries to get to the bottom of one of the most frustrating sources of flats.

Zinn weighs in on some quotidian questions — like, can constantly removing and replacing a thru-axle damage the threads?

The most efficient gear choice may not be what you think it is.

Counterfeit carbon frames not only are shaped, painted, and decaled to look like the brand-name frames they are mimicking, but they are often also built to weigh the same as those brand-name frames.

There's far from a consensus when it comes to sitting on top tubes.

'Don’t sweat trying different tire sizes on your gravel bike,' says Lennard Zinn.

Lennard says you can 'rung what you brung' in terms of chains and mineral oil and talks about his exploits on the legendary Morgul-Bismarck course in Boulder

Lennard asks the experts at Zero Friction Cycling, Ceramic Speed, Silca, and Molten Speed Wax about the order of operations.

Will using tire sealant in an inner tube prevent a catastrophic flat tire? Plus, how much force will break a titanium pedal spindle?

Lennard Zinn joins tech editor Dan Cavallari to discuss the in-depth test Zinn performed on the most popular sunglasses for cyclists.

Lennard addresses those pesky seat clamps, and helps one reader fix an annoying and dangerous descending shimmy.

Lennard Zinn's wheel study gives us the scoop on whether you should be riding climbing wheels or aero wheels. Zinn also explains the concept of moment of inertia.

Lennard Zinn went in search of the most aerodynamic combination of rim and tubeless tire. Here's what he found.

Running tubeless tires without sealant, and examining the precision of the ETRTO standard for measuring tire and rim widths.

More discussion about measuring chain wear, and the correct way to align chainrings.

Take the guesswork out of chain stretch, and be scientific about drivetrain wear.

Lennard Zinn conducted durability tests on the 13 most popular 11-speed chains. Zinn found the strongest (and the weakest) chains, and produced a cost-analysis chart for grading them.

In this week's column, Lennard looks at firmware updates for electronic shifting, mixing mountain and road components, and using tire liners for additional tube protection.

In this week's column, Lennard explains how the position of your rear derailleur can impact chain friction.

In this week's Technical FAQ, a reader wonders why his Specialized S-Works Turbo 2Bliss blew off his Hunt Aero 30 wheels during a ride. Lennard believes the answer lies in the reader's crochet-type rims.

In this week's column, Lennard addresses a reader who made his own calculations for how to measure the friction losses in a bicycle's drivetrain.

In this week's column, a reader wants to know whether there is any data on the life expectancy of carbon-fiber racing rims.

Why don't road and MTB handlebars have the same grip diameter? In this week's Technical FAQ, Lennard explains the logical reason behind this fact. Also, a reader wonders how ultrasound is used to check carbon for damage.

When a reader cannot stay warm on those long descents in the Alps, Lennard chimes in with some sage advice. Staying warm on descents, even on summer days, requires a riding and apparel strategy.

In this week's column, Lennard fields questions about friction caused by cross chaining in modern drivetrains.

A reader survives a crash with an automobile, but his steel bike does not. How should he go about repairing the bent frame? Plus, mixing SRAM Rival and Campagnolo Record components.

Lennard offers advice on the best cycling boots for cold conditions. Plus, a carbon repair firm weighs in on the damage that can be caused by indoor trainers.

Bicycle manufacturers offer advice on using a carbon-fiber frame with an indoor trainer. Plus, can tire sealant corrode raw aluminum?

In this week's Technical FAQ, a reader weighs in about using a warm hat and how it impacts helmet fit; plus, is it OK to reuse your cables and housing after trimming away the fray?

In this week's Technical FAQ, Lennard fields questions about mixing Shimano GRX components with XT; plus, a reader who applies cleaning wax to his bike discovers a problem with braking on carbon rims.

Lennard Zinn builds extra large bikes for extra large people. In this At the Back column from 2009, he recounts building a custom bike for Bill Cartwright, head coach of the Chicago Bulls.

In the old days, pro riders like Jan Ullrich often raced on custom bicycles painted to look like a sponsor's bike. Does this practice still occur? One reader wants to know.

After a reader suffers a tubeless blowout on a Pyrénées descent, Lennard digs into the potential causes for the catastrophe.

A reader writes in after an unfortunate crash on tubeless tires; Lennard gets more feedback on his lightning column

Lennard receives ample feedback from his recent column about lightning strikes and frame material, plus some insight into proper junior gearing

With Father's Day on tap for the weekend, we feature this 2000 At the Back column from Lennard Zinn.

Lennard Zinn attended the unveiling of a new monument in Colorado honoring the Coors Classic/Red Zinger

In this week's column, Lennard discusses how to make sure that your front and rear wheels are aligned in the same plane

Lennard gives advice on how to check a crashed carbon frame for damage; plus, advice on how to store your Shimano Di2 bike

Lennard fields a question about chain articulation from his 1X vs. 2X drivetrain test; plus a question on steering damping

Lennard offers advice on cleat adjustment and saddle height, and explains the mystery behind those annoying "snake bite" flat tires

Is SRAM's new AXS flattop chain compatible with existing wide/narrow chainrings? Plus, more follow-up on a reader's question about shifting with limited hand strength

Lennard Zinn put 1x and 2x drivetrains to the test at CeramicSpeed USA's laboratory to discover which produces more friction.

Think you know how a bicycle works? Think again. Lennard Zinn joins us on Fast Talk to discuss the physics of bike design.

Longtime VeloNews contributor and VeloPress author will oversee product testing for the magazine

Lennard Zinn answers questions about Campy EPS compatibility, whether you can save money on non-Campy parts, and more.

Lennard Zinn answers questions about coping with arthritic pain, fixing toe overlap, and making a rear derailleur spring back to life.

Lennard Zinn answers questions about tubulars, how to mix and match 10- and 11-speed parts, plus more thoughts on kit tailoring.

Thinking ahead to spring riding? Lennard Zinn has a simple checklist to make sure your bike is ready to ride.

Tech FAQ: Tubular tires and rolling resistance

Lennard Zinn writes a follow-up about his heart arrhythmia to explain how exercise can cause irreparable harm to the organ.

Zinn answers questions about 'cross tubular glue/tape combos, the right brakes for cold-weather riding, and how to stop a slipping cleat

Lennard Zinn answers a litany of questions about how to improve braking performance on road bikes

This week, Lennard Zinn answers questions about bike positioning and shimmy

The rapidly changing conditions at the USA Cycling Cyclocross National Championships made tire selection and pressure choices especially important

With the world championships approaching Lennard Zinn discusses tires for cyclocross

Lennard Zinn explains his fully-customized cyclocross setup, right down to the smallest manufacturing details

Lennard Zinn was building 650b bikes in the '80s and reminds us of their history and advantages, and thinks the industry will come around

Lenndard Zinn says you'll forget about the price of the Kronolog dropper post for the infinitely-adjustable ride without the usual drawbacks

Zinn answers a reader question about the value of weight savings and responds to a detractor

Lennard Zinn answers reader questions on bike fit techniques

Lennard Zinn responds to readers' comments from previous columns and offers tools to make your bike fits match

Lennard Zinn responds to the pounds of me he received after last week’s story of tire cleaning-gone wrong

LZ takes on XTR compatibility

Zinn expands on what you need to know about balancing tire width, pressure and aerodynamics

LZ has some suggestions for fine-tuning your Eggbeaters to suit your different shoes

LZ uses skinnier tires to cut through the mud down to where the traction is, rather than wide tires with low PSI and float on mud without traction

Also: needing more rear offset, 52x34 on a double, amateur tool kits

Also: Removing Belgian tape, re-inflating tubeless when traveling and gluing in a slipping seatpost