Posts in the category Triathlon

Review: BBinfinite’s amazingly smooth one-piece pressfit bottom bracket

BBinfinite one-piece pressfit bottom bracket

BBinfinite debuted last May with a unique, one-piece pressfit bottom bracket design intended to remedy any intolerances in your frame, ensuring smooth, quiet cranks. Shortly thereafter, we received a test unit and combined it with our SRAM CX1 build and it’s been smooth sailing ever since.

The BBinfinite bottom bracket sets itself apart by putting both bearings in a single shell, allowing them to control the placement of each in relation to the other without regard for any differences in frame design. As they told us, even an offset as small as 1/1000th of an inch can cause drag and premature bearing wear. From our own experiences, we believe them. With their system, you have perfect alignment between the bearings. You also end up with a much broader contact patch between the shell and the frame, which eliminates play and, thus, creaking.

That’s the promise, here’s how it held up…

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Velo Zephyr cradles your forearm w/ tapered, ergo carbon aerobar arm rests

Velo Zephyr ergonomic tapered carbon fiber arm rests for triathlon bike aero handlebars

Aiming to make those long distance triathlons and TTs a little more bearable, Velo Zephyr is crowdfunding production of their new tapered arm supports.

Rather than using a stock arm rest that’s typically much shorter, VZ’s new design spreads your weight across a larger portion of the forearm and tapers the shape to follow the natural curve of your appendage. The result should be better comfort and less slipping forward, which builder Steven Herzfeld says lets you focus more on the pedaling.

The very modest $350 Kickstarter goal has been met, but if the campaign continues to grow it’ll allow him to have proper aluminum molds machined to streamline production. As is, he’s using 3D printed molds to form the arm rests…

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Bontrager Aeolus aero carbon wheels get lighter, wider & tubeless, plus disc brake options!

Bontrager-Aeolus_5_TLR_Disc_D3_Clincher

Combining all of our favorite features into one, the new Bontrager Aeolus D3 wheels are looking like category killers by going wider and lighter and adding disc brake compatibility.

Across the entire line of depths ranging from 30 to 50 to 70 to 90 millimeters in depth, all of the clincher rims get lighter by up to 110g per pair. And, the clincher rims increase to a healthy 19.5mm internal width between the bead hooks (27mm external) and get their proven TLR (TubeLess Ready) design. All depths come in both clincher and tubular options, and the 3 and 5 series get disc brake options with hubs ready for Shimano’s CenterLock rotors.

All of them use the D3 shaping to improve aerodynamics on both leading and trailing edges, and they’ve got a detailed white paper (PDF) that explains their aero shaping, theory and test results. The short of it is pretty standard for modern aero wheels: it’s designed to reduce drag on both the tire-leading and rim-leading sides while also improving stability in crosswinds. In this day and age, those are simply the minimum requirements to play ball, it’s the other features that make ’em worth a look…

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Jagwire Elite Cables Ditch Coatings for Ultra Slick, Polished Steel

Jagwire elite cable super polished no coating shift (3)

As drivetrains get more and more speeds, and shifting tolerances become more exact, the quality of shift cable is more important than ever. Many cables rely on a polymer or PTFE coating to offer silky smooth shifting, but coatings usually suffer the same fate – they wear long before the steel cable inside.

For Jagwire’s new Elite cables the answer is simple. Just eliminate the coating completely. Instead of coating the cable Jagwire has revisited the construction itself which achieves an impressively smooth finish thanks to stainless steel strands that are tightly wound and then highly polished. The polishing process removes any of the burrs on a microscopic level that make the cable less slick and creates a cable that supposedly functions just as well as coated cables but is more durable.

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Wheels Manufacturing heats up with cryo-hardened Zero ceramic BB’s

wheels-manufacturing-bb30-to-24-zero-ceramic-bearing-bottom-bracket2

Technically these have been available direct from Wheels Manufacturing for about eight months now, offered in what they’ve called a “soft launch”, but they’re making their formal introduction at QBP’s Frost Bike this week. This means they’re going prime time with broader distribution, and as their reps show them off in below freezing temps, the story of what makes the Zero ceramic bearings special will seem right at home.

Using solid ceramic bearings, the races are cryogenically frozen to make them ultra hard. That increases the smoothness and durability, and then they swap in a single-lip seal rather than the usual dual lip seal to further reduce drag. Here’s the nuts and bolts of it…

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ZIPP Recalling First Generation 88 Hubs from 2008-2010

Zipp_88_hub_recall_Gen1_affected_hubs2

SRAM sent us a communique at the end of the week that we thought we should pass along since it included the phrase “failure that might result in an ejection of all the wheel’s spokes.” Yeah, that would be bad. Obviously this hasn’t happened on the majority of the 88 hubs since they made about 12,000 of them in this version, but with 2 reported failures, the danger is high enough to urge caution and get them replaced ASAP. Affected wheelsets came OEM on several high-end Cannondale, Felt, Giant, Orbea, and Specialized bikes from 2009-2011, as well as just about all of their high-end front wheels sold from October 2008 – December 2010.

The root of this recall is spoke retention, a concern only with first generation front hubs. Specifically, the first generation 88 hubs could incur retaining ring failure that might result in an ejection of all the wheel’s spokes. This may result in wheel failure.

Anyway Zipp parent SRAM has initiated a recall through the CPSC and you can find more info there. SRAM wants to get all affected owners back out on safe wheels quickly, so local SRAM or Zipp dealers should be able to quickly start the warranty process and in most cases rebuild the affected wheel with the newer, redesigned hub. Come past the break for a simple look at how to tell if your wheels are affected.

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SRM Nears Launch of PC8, Introduces Electronic Indoor Trainer/Fit Bike

SRM PC8 power meter magnetic trainer (3)

When power meters are your bread and butter, you want to get it right. That seems to be the case with the newest version of the SRM Power Control, the PC8. First spotted as far back as Sea Otter 2013, SRM announced production of the new unit during the 2014 US Pro Challenge. As it turns out, something as small as the style of buttons has caused the delay in production but SRM assures us the new gadgets will be released in March.

At first, SRM wanted to use electronic (not mechanical) buttons that functioned similar to the screen on a smart phone. Over the course of testing however, it was determined that too many factors such as gloves, mud, water, etc. would cause difficulties with the buttons. Understandably, not being able to easily use the buttons could be a big problem especially if you’re a pro using the PC8 during a race – or in the case of Rohan Dennis, breaking the hour record.. Because of those factors, the PC8 will be going back to the old school “clicky” buttons to make it as user friendly as possible.

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Falco brings narrow/wide 1x chainrings to triathlon for simpler, faster times

Falco voice 1x narrow wide chainring for triathlon bikes with dura-ace cranksets

It was probably only a matter of time before narrow/wide chainrings made their way to the pavement. Falco Bike, who you may remember more for their Tron-inspired V-wing aero bike, has gone ahead and skipped right over standard road bikes in favor of triathlon.

Their new chainring mounts to the asymmetric 110BCD bolt pattern of the latest Shimano Dura-Ace and Ultregra, as well as the compatible SRM power meter crankset. The chainring is CNC’d from 7075-T6 alloy and comes in at just 147g for a 54-tooth, the only size offered. According to the press release, tooth profiles are made to offer just a bit of chain retention since, in the absence of shifting, dropped chains during triathlon are pretty rare. Instead, the profiles are focused on smooth, quiet performance…and saving watts.

They claim a 1.5-2.5 watt savings over an Ironman distance ride, netting you about 35 extra seconds on the run. If the course is hilly, it can be combined with a 32-tooth little ring cassette cog just in case, though we’re guessing that’d make for some big jumps between gears compared to a standard road cassette. Retail will be $99, we’re waiting to hear back on availability.

Koobi softens up with new 232 Sprint triathlon saddle

koobi-232-sprint-triathlon-saddle-2015b

Following the 232T saddle introduction last year, Koobi has reworked the shorter, wider shape into a softer model for lighter weight, smaller riders. It retains their signature cutout and triathlon position friendly dropped nose, but uses a softer padding and more pliable cover material.

Tuck into the recommended usage chart and more pics below…

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