2013 NeilPryde Bayamo Triathlon Bike

Transcription

4/11/2016
2013 NeilPryde Bayamo Triathlon Bike – Aerodynamics by BMW, Alumni Design
2013 NeilPryde Bayamo Triathlon Bike – Aerodynamics
by BMW, Alumni Design
The Bayamo was first spotted at Interbike as a prototype and is designed to offer the dual package of
aerodynamics and stiffness. Comfort wasn’t as much of a consideration as with the Bura SL because, in
most cases, triathletes and time trialists are on fairly smooth pavement.
Two models will be offered, a standard Bayamo (shown) and a more integrated Bayamo Plus. It was
designed in conjunction with BMW and Alumni Design. BMW provided the industrial design and styling,
using their own knowledge of aerodynamics. Throughout that process, Alumni’s Kevin Quan (a prior
employee of Cervelo that worked on the P3 bike) fine tuned it using a unique take on the Kamm Tail
design.
http://triathlonrumor.com/2012/06/26/2013-neilpryde-bayamo-triathlon-bike-aerodynamics-by-bmw-alumni-design/
1/8
4/11/2016
For aerodynamics, they wanted it to be fast and stable with crosswinds up to 15°. To create a fast and
stiff bike, they benchmarked it against the Cervelo P3 and Trek Speed Concept.
Bike division manager Mike Pryde says the shape alone of the Bayamo does a lot to provide better
stiffness numbers than those two bikes. Their Kammtail airfoil downtube claims to be stiffer thanks to its
wider 30mm cross section (compared to 26.7mm on the P3 and 27mm on the Trek – their
measurements, not ours).
2/8
4/11/2016
Besides width, the other differentiator is the actual Kamm Tail shape. Where most people think of the
Kamm Tail as a flat slice through a teardrop shape, it actually refers to any truncated teardrop shape.
The Bayamo’s trailing edge still goes to a point, but the point gets flatter as it nears the bottom bracket.
This has two benefits: first, it keeps the bottom bracket stiffer because it’s more of a box section tube
shape there. Second, it creates a more aerodynamic tube shape when the wind has a higher yaw angle
(ie., bigger crosswinds). Diagram above is a rough representation of the trailing edge of the tube at
various points.
The lower bottle mount has three bolts, letting you run one single bottle in the lower position for short
courses, or two bottles in their regular positions with one on the seat tube. Or just forgo them both and
mount them behind your saddle using a third party contraption.
3/8
4/11/2016
From there, they improved it further by giving the seat tube a Kammtail trailing edge that carries through
to the seatstays. The back of the fork legs uses the same flat shape. They used CFD to optimize the
shapes of each tube.
4/8
4/11/2016
On the standard Bayamo, cables enter the headtube directly behind the stem, and all cables run full
length housing with internal retainer to keep it from rattling. This lets you replace just the cable very
easily.
5/8
4/11/2016
Development was driven by the UHC team, and it has UCI approval, but it’ll also be their triathlon
offering. In working with the United Healthcare riders, one of the surprising requests was to improve
braking performance. Riders said they wanted to be able to brake as late as possible, then accelerate
hard out of the corners.
The frame weight is 1300g bare, and 1332g with hanger, bolts and BB guide. Fork is 308g, complete
frameset is 1640g. Five sizes will be offered, S through XL, with top tubes from 469mm to 565mm. Retail
is $3,250 for the standard frameset. Theyll ship in August in S, M and L, with other sizes following soon.
The Bayamo Plus gets several upgrades. The front brakes are TRP and integrated into the back of the
fork legs. Pryde says using an existing brake model makes replacements and maintenance far easier.
There’s a patented adjustable stem that has both angle and length adjustment. It uses side plates with
holes drilled at center, +/5mm and +/10mm, giving it an effective 20mm of range adjustment. The stem
6/8
4/11/2016
base will be in different lengths based on frame size, with options for people with unusual body
proportions. The angle of adjustment is huge, virtually from straight down to straight up.
The firm has an integrated nose cone that sits in front of the head tube and is built into the stem’s base.
This front end, including the fork, front brake and stem, could be added to the standard Bayamo
anytime.
A TRP rear brake is integrated under the chainstays with a removable service port cover just in front of
it. It has a brake plate for the rear brake, which makes removal quicker and easier. Cable stop covers
are also removable for easier installation.
Both frames are Di2 compatible with small wiring ports and battery mounts under the chainstay, further
back from the brake.
Look for the Plus to be up around $5,500 and probably available in November.
WEIGHTS:
7/8
4/11/2016
The Bayamo with DuraAce 7900, Mavic Cosmic CXR 80 came in at 17lbs 7oz.
They also introduce their new Bura SL lightweight racing road bike, covered over on Bikerumor.com.
8/8

2013 NeilPryde Bayamo Triathlon Bike

Transcription

Similar documents

Get Ready to Race! Skills Camp

Visit a Navy AutoSource Representative on-board

BMW Isetta - Studio 434

contents - Roaring Toyz

Township of Wall Regional Bike Path Central Section Map Map 3 of

fix-it-yourself bike stand 1693e, 624172

2016 MEDIA PACK

Thunder Run 2014

FOR SALE 1982 XJ1100

Honda CB450 Restoration

Flyer 2016

Aerodynamics - Seminar Topics