Lennard Zinn

In 2003 Monte Zoncolan made its debut in the Giro d'Italia. Lennard Zinn was there to document the action.

VeloNews technical expert Lennard Zinn takes a deeper dive into finish line cameras, offers suggestions about SRAM drivetrain batteries, cardiac health and prevention, and oversized derailleur pulleys.

The VeloNews tech guru explains what a finishline camera records, and how it may differ from a still photo, and even what you think you see.

VeloNews technical expert and author of the Haywire Heart Lennard Zinn answers questions about side effects of ablation procedures, and also Supraventricular Tachycardia.

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

VeloNews technical expert and author of The Haywire Heart answers more questions about a variety of concerns about athletes with heart issues.

Whether Štybar can race again at his former level — only time will tell.

Tips for mixing Campy and SRAM drivetrains, internal cable routing, and how frequently to replace a carbon fork.

VeloNews' technical expert offers suggestions for fishing internally-routed cables and further discussion about chain tension with oversize pulley wheels.

Chain friction in systems with oversized pulley wheels, and more solutions for mounting a rear rack on a carbon frame.

Mixing 11- and 12- speed SRAM eTap shifters and derailleurs, 11-speed chainrings on 10-speed drivetrains, and mounting a rack on a carbon frame.

Campagnolo drivetrain maintenance, Shimano wide-range gearing, and mounting racks on carbon road bikes.

How to set up Shimano Syncro Shift to get a wider gear range.

Shimano GRX/XT/XTR drivetrain compatibility, standards for weights, and Campy shifter rebuilds.

Mountain bike tech could offer a UCI-legal solution to improving aero positions on road bikes; more discussion about skin sensitivity, allergies, and irritations when wearing cycling shorts.

Our technical expert discusses rashes and adverse reactions to materials used for cycling apparel.

We test and analyze eight different tuck positions for speed and control.

VeloNews' technical expert take a deeper dive into the math involved in calculating chain tension.

How to service a Shimano rear derailleur with a Shadow+ clutch.

How to calculate chain tension, and how it relates to power output and gearing.

The VeloNews technical expert takes a deeper dive into protective cycling apparel.

VeloNews' technical expert talks about drivetrain alignment and more about how to diminish wrist pain when riding.

The VeloNews technical expert discusses saddle woes on the trainer and also why apparel manufacturers are just starting to make protective clothing for the road.

The VeloNews technical expert discusses optimal tire-rim widths, T47 bottom brackets, and how to silence shrieking disc brakes.

VeloNews' technical expert offers a clue into black boxes on bikes and a better explanation of why to grease threads.

Solutions for alleviating wrist pain while riding, and how to get wide-range gravel gearing.

The VeloNews technical expert offers suggestions on how to manage riding with arthritis, and when to lube vs when to use a thread-lock coating.

Expert advice from Lennard Zinn on how to get your cleat adjustment right and maintain a proper fit.

VeloNews technical editor Lennard Zinn offers advice about lubricating e-bike chains and the mechanics of gearing and timing chains on tandems.

VeloNews technical expert answers questions about cross-chaining and drivetrain friction, as well as disc brake pad delamination.

VeloNews tech expert Lennard Zinn offers insight into SRAM chainrings with a CeramicSpeed bottom bracket, and disc brake pad surface issues.

Our technical expert offers advice about SRAM front derailleurs, and shoes for those with differing foot sizes.

VeloNews technical expert examines using Mastik tape and tubeless sealant with tubular tires, how to adjust a SRAM front derailleur, and more.

Polarized, UV protection, lens distortion — what do all these terms mean when it comes to buying sunglasses? And do they even matter?

VeloNews technical editor Lennard Zinn answers your questions about hacking electronic shifting, braking technique, and tire pressure.

VeloNews tech expert Lennard Zinn examines possible causes of recent crashes in time trial events.

Lennard Zinn analyzes how geometry, braking, and tire choice could have played a role in Dygert’s world championship crash.

Our technical expert answers questions about pro teams tracking flats and muddy, icey SRAM chains woes.

VeloNews technical expert Lennard Zinn answers your questions about mechanical issues and bike geometry and handling.

Our technical guru answers questions about bottom brackets, floor pump gauges, older Campy style cable housing, and frame geometry.

Buying the lightest wheelset is the best way to win a hillclimb, right? Not so fast. 

Lennard answers questions about Shimano GRX drivetrain compatibility, tubeless-ready tires on standard rims, and how to manage sticky bottle-bosses.

Questions answered about steerer tube spacers, disc brake maintenance, and carbon rim brake track wear.

I received a lot of responses, and many of them are so interesting that I wanted to share them with you.

Keep your brakes tuned for reliable stopping power—using just one or two tools.

I previously wrote about how we might maintain the current cycling boom. I received many wonderful letters in response, and I can hardly contain my enjoyment at reading them.

Get to know your MTB’s through-axles for easy removal, installation, and adjustment.

Lennard answers questions about Shimano GRX chainline and derailleur adjustment, brake calipers, and also reviews questions about Salsa adjustable seatposts

You proudly house 4+ bikes in the garage, but how’s your arsenal of tools? Here are some suggestions to upgrade your workshop.

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

I started riding during the bike boom of the 1970s, and now we’re in the midst of another one.

Overhaul the air can every 40 hours of ride time to ensure it is cleaned, lubed, and properly sealed and inflated.

Maintain a road bike front derailleur to shift smoothly and avoid getting a dropped chain.

Lennard offers advice for solving fork vibrations, and troubleshooting SRAM battery drain.

Lennard answers questions about multi-brand shifting compatibility across different speed groups, and how to alleviate the causes of sore arches.

Lennard answers questions about riveting carbon frames, freeing a frozen seatpost, and tricks bleeding Shimano disc brakes.

Five minutes spent in the garage could save you 30 on the trail or road. Check your bike before you ride, and take the right tools so you’re ready for anything.

Maintain and adjust the rear derailleur clutch so it can do its job in any terrain and trail condition.

Tech expert Lennard Zinn offers suggestions on how to fix shifters, if it's OK to ride a carbon bike on a trainer, and optimal tire setup.

Lennard offers advice about how to secure a carbon frame into a workstand; discusses SRAM AXS drivetrain cross-compatibility; how to re-align rear derailleur hangers.

There are many variables to consider when examining how a bike handles when riding no hands.

Lennard Zinn instructs on how to deal with a misaligned mount, addresses the advantages of tubeless tires, and explains the sailing effect when riding with the wind.

One reader asks about using a Campy crank on a Shimano drivetrain, while another reader inquires about mixing in a Wolftooth component.

Sometimes the best thing you can do for your bike is to replace the cables and housings. Drag on shift cables caused by contamination will prevent accurate and consistent shifts.

A dual-sided power meter may be helpful in determining differences in left-right power production.

I’ll bet lots of people have looked at the marks on shoe soles and wondered what they mean. I passed this question along to Shimano, Bont, Giro, and Scott.

Tubeless tires on a tubeless rim with a bead-lock ridge should stay mounted better than most clinchers upon rapid deflation — though still not as well as a well-bonded tubular.

We answer reader questions about eTap battery drain, and what cleaners are safe for bike finishes and can also be used as disinfectants.

When disinfecting — mild solvents like isopropyl alcohol, up to quite strong ones like acetone — are not going to damage a bike.

When the Paramount was relaunched in 1998, the demand for the bike was so high, they were painted and shipped them as fast as they came in from Serrota.

Lennard answers questions about rebuilding a Serotta - Schwinn Paramount with a new fork, mixing and matching Shimano and SRAM components, and making a mathematical correction.

The burgeoning U.S. e-bike market will soon see big developments focused on three characteristics: versatility, power, and weight reduction.

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

When riding tubeless tires, don't leave home without a spare tube, tire levers and inflator, which can be used should you suffer a blowout which will not seal.

The superstars of some pro cycling teams are catered-to by their bike sponsors, at least to give them a psychological edge of thinking that they have a special bike—if not an actual performance advantage.

How to mix and match SRAM chainrings, chains, shifters and cassettes, and also how to unfreeze a frozen bottom bracket.

Ultrasonic, non-destructive frame testing is not a reliable method unless one has a perfect reference sample of the same carbon used in the fabrication of the bike frame.

Why to use a chain gauge to measure bicycle chain wear, when you can use a ruler instead.

Lennard addresses sealant causing high-speed wobbles, and mounting tubeless tires without sealant.

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