Lennard Zinn

Flats and tubeless woes are in the spotlight this week.

How many spare links is too many?

Different speed chains require different installation methods.

Keeping your bike on the trainer all the time doesn't make it maintenance free.

Determining helmet safety requires testing, so we tested six helmets beyond the certification tests required to sell bicycle helmets.

How long will your disc brake pads last? There are a lot of factors at play.

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?

Recent standardizations in tubeless wheels and tires have changed Lennard Zinn's mind on tubeless.

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.

Tips for extending the life of tubulars tires in their second year of use.

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?

Which inner tubes have the lowest rolling resistance? Or is it no tube at all? Lennard Zinn investigates.

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

Shorter legs = lower saddle, lighter cranks = less energy spent

In this week's Technical FAQ, Lennard Zinn answers questions on tire pressure and chain optimization.

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

An interesting back-and-forth discussion of rolling resistance data.

Examining hill gradients, Campagnolo components, and the IT band.

Examining the effects of crank length on saddle position, and changes to gearing.

A story on how to insert yourself in a Grand Tour gruppetto.

Tips, tricks, and hacks to alleviate leg and knee pain.

Are tubeless tires for road — and pavé — a trend or are they here to stay?

Hacks to get the fit you need on your road bike.

A refresher in Isaac Newton's laws of physics as they pertain to materials used in bicycle fabrication.

A look at some of the concerns surrounding new and repurposed carbon fiber materials in the production of bikes and bike parts.

How to service Phil Wood Hubs, clean disc brake calipers pistons, and praise for Di2 ‘triples.’

Is the pro peloton finally catching up to Lennard Zinn's predictions about dropper posts? More disc brake maintenance tips.

The final word for optimizing your chain for low friction and longevity from industry experts.

To remove—or not—the lube that ships with chains, and more options for ‘climbing’ gears.

Manufacturer guidelines and recommendations for tubeless tire inflation upper and lower limits.

In this test from the March 2013 issue, Friction Facts measures the efficiency cost in watts for the most popular chain waxes and lubricants.

How to choose and apply chain lube, mixing double and triple chainring groups, what Campy parts work with each other.

Mix and match accessory hydro levers, stripped Camp crank bolts, and Campy front derailleurs.

Differences between chain lines of Campagnolo, Shimano, and SRAM disc brake setups.

Space for disc brake rotors, gearing combinations, and chain line considerations for Shimano and SRAM drivetrains.

Swapping stems, handlebars, and spacers for more comfort on your bike.

Considerations for adapting stack and reach when loss of flexibility becomes a consideration.

Do weights of tires factor into the amount of energy required to turn them, and discussions of what causes front-end shimmy.

Cycling wheel and tire experts offer opinions about and insights into tire testing.

VeloNews technical expert examines brand cross-compatibility of brakes and drivetrain components.

A real-world example of how rolling resistance impacts effort, and duration, over a 200-mile gravel ride.

A discussion of tire rolling resistance testing methods and protocols.

We tested on a rough lab surface at pressures from 22-87psi, and investigated various construction methods, puncture protection strategies, and the tradeoffs of tread patterns.

More tips for mounting tubeless tires on tubeless wheels.

How to mix and match braking components across brands, and why Shimano does not offer a 10-tooth cog for new groups.

How to size tires to rims and more discussion about tire hysteresis and aerodynamic drag.

More analysis of tire pressure and rolling resistance at the ‘Hell of the North,’ and tubeless tires removal and installation.

The finish order of the riders in the Hell of the North mirrored the finish order of their tires in our rolling resistance test.

Optimal rim/tire combination widths, rolling resistance, and tire-wear questions answered.

Simple tips and clever tricks for getting stubborn tubeless tires mounted on rims.

Technical expert Lennard Zinn offers tips and tricks for mounting tubeless tires.

What causes tires to absorb more or less of a rider’s energy?

We sent clinchers, tubeless tires, and tubulars to Wheel Energy for rolling-resistance tests at range of air pressures. The results surprised us.

Technical expert Lennard Zinn offers his views regarding carbon fiber longevity and the future of tire tech.

Lennard Zinn discusses tubeless tire standards, drivetrains, stainless steel frames, fork flex, and more.

Options for custom steel frames, more advice about tubeless repair plugs, and un-sticking sticky components.

Lennard Zinn answers questions about cockpit aerodynamics, wide tires, and sticky components.

Technical advice about bike geometry, high-speed shimmy, and plugging tubeless tires.

Can tubeless tire plugs be shed? Lennard Zinn has answers.

VeloNews technical expert answers questions about the future of tubular tires, and the science behind ‘tank-slappers.’

Lennard Zinn answers questions about dating Campy components, SRAM chainring compatibility, and tolerances for new TRP brake rotors.

Tips for traveling with disc brakes, road tubeless safety, and bespoke yellow cycling kits.

More tips and tricks for limiting high-speed wobble, mixing drivetrain components, and more.

VeloNews technical expert discusses tire pressure changes while riding.

What you'll need to increase gear size — and rear derailleur tooth capacity — for Campy, Shimano, or SRAM drivetrains.

The VeloNews tech expert offers advice about how to stop ‘tankslappers,’ keep tubulars in place, and more.

VeloNews tech expert answers questions about v-brakes and hydraulic brakes.

VeloNews tech expert continues a discussion about titanium spindles for heavier riders, tubeless sealant in tubes, and more about finishline cameras.