Monday, May 5, 2008

Smoking Hot....

Spent lunchbrear over at the YETI forum on MTBR, and look at what got posted.
To me, this thing looks killer....
And killer light at 9.6kgs...

Variation on an Arc-X

Mels ARC-X. Not a fan of drop bars she went the flat bar option. Sweet.

One Sunday...

so while everyone was off racing the 6 hour at YouYangs(congrats to team Yeti, Russell and Erica, Winning MixedPairs) I was exploring the hills.

From Ivanhoe to Whittlesea, up the Humevale climb and over to Kinglake. From there down the Toolangi hill and out to Yarra Glen. I decided not to do the Healsville/Chum Creek Road loop so headed home via Kangaroo Ground and Eltham.

A bit over 5 hours of riding and a great day for it. Somehighlights for the day were

- the tailwind into Yarra Glen, big ring all the way

- dispatching some guy up the climbs to Kangaroo Ground who thought my wheel would be great to draft off

- the custom number plate BUTFLY

yep, i know what its SUPPOSED to mean, butt.... ha ha ha

Thursday, May 1, 2008

Yeti ASR-c Review

The Yeti AS-R Carbon is cutting-edge in every sense, right down to its trim-to-fit seat mast - which comes with its own cutting jig, plus the option of trimming it down to fit a conventional seat clamp and post. That might prove useful if you sell the frame to someone else or feel that occasional seat drops need to be possible. But despite the practical streak in our test rationale, we can't help but find a certain appeal in the 'just for me' custom-fit saddle height.

Yeti Cycles started way back in the early days of MTB history, and racing has always been the spearhead of its development, with a whole host of legendary riders such as John Tomac, Juli Furtado and Missy Giove adding competitive kudos to the already considerable design expertise. Yeti's speed-freak approach to every bike it creates continues to set precedents for type, performance and durability.
This brings us neatly to the AS-R Carbon. A 'For Racing Only' tag on the top tube is a hint to its design intentions, but don't let that put you off. There's no doubt that the AS-R Carbon would make a superb XC race bike, but it's also a wonderful trail bike. The Yeti's geometry is confidently neutral, to the point of feeling almost casual under pressure. Minimum weight makes it feel nervous from time to time, but the bike's Bambi-like exuberance turns nervous energy into speed surges before any feelings of hesitation have time to grip your ride mood.
All the frame sections are sculpted to achieve the perfect mix of high strength, lateral rigidity and noticeable absorption of minor vibrations, at the same time as trimming half a pound of heft from the previous alu version. The carbon 'dogbone' bridging the seat stays and the shock across to the top tube is an important part of the design. It inhibits swingarm flex, prevents side load on the shock and controls the system's leverage ratio curve, which helps to dictate the ride feel.
The frame's main pivot sits just above the bottom bracket, between the inner and middle chainrings. Neat alu sections holding the bearings are bonded into a single piece asymmetric carbon chainstay structure. A tough wraparound sheath with an extra deflector plate by the crankset stops chain slap from damaging the right chain stay. Rather than putting an extra pivot at the dropouts, Yeti has shaped the carbon seatstays to give a little vertical flex under pressure. Such detailing flatters the low weight of the full carbon structure, with a medium-sized frame tipping the scales at about 4.25lb, compared with 4.7lb for the alu version.
A Fox Float RP23 shock comes as standard, so you can fettle the ride feel as much as you like. While unwanted shock bob isn't really an issue, there are three ProPedal damping settings and a lockout option.

So what about that seat mast? Aesthetically, it's what draws you to the frame before you've even noticed its carbon build, but is it a good idea? The four-bolt alu clamp on top of the mast weighs about the same as a seat clamp plus a post top, so there's minimal weight saving there compared with a normal carbon post
The AS-Rc frame offers a ride that can be as active or as passive as you want it to be, depending on how you set up the shock. The main pivot position combines well with the dogbone link to offer lots of low-speed comfort through excellent small bump responses. The Fox RP23's ProPedal thresholds allow pedalling stability even with fairly low shock pressures, combined with plenty of medium bump sensitivity. The arc of the dogbone linkage also creates a slightly less progressive shock rate than an in-line setup.
The fact that the ride feels inspired is certainly not all down to the shock, though. This is a frame that would be a pleasure to ride without platform damping. Even on the most demanding rocky singletrack, it's a point-and-pedal bike in the best possible way. The steering angle is a little slacker (read more relaxed) than on some pure race bikes but the steepish seat angle makes you sit right in the middle of the bike and really work the fork. Both the steering and the back end manage to feel tight, animated and remarkably forgiving, all at the same time.

Generous bottom bracket height means you keep pedalling hard through the trails, which is a big bonus on a bike that's built for XC speed. The long top tube offers an efficient stretch for high-speed XC work and climbs, where the 22lb overall weight of our test bike obviously helped considerably too.


Yeti's AS-R Carbon is a bike built for those seeking maximum XC speed. It's not a pure race bike, but a racer would benefit greatly. The seat mast feature is of dubious benefit, but you can convert it back into a normal post and clamp bike if you don't like the purist touch.
In Australia the AS-Rc is available as a frame-only deal or with a choice of Pro, Race or Ride builds from importers Yeti Cycles Australia.

THE DESIGNER SAYS... Yeti AS-R Carbon designer Steve Hoogendoorn to explain a little about the bike. Here's what he said: "We didn't want to make a full carbon AS-R just to make a carbon frame. There needed to be clear advantages. After analysing our current alloy AS-R and talking with our racers, we saw a real opportunity to improve stiffness, decrease energy loss and drop some weight. All of the details we added to the frame were done to improve the following points:

Press-in Shimano BB cups save weight on a complete bike and make the BB shell 19.5mm wider. A wider shell allows a far stiffer construction at the BB to down tube meeting point. Also, the shell can be shaved down to run a 2 by 9 configuration.

The uninterrupted carbon seat pillar saves weight on the complete bike and significantly improves the energy transfer from rider to crank.

The carbon dogbone -- while heavier than the alloy version -- drastically improves the stiffness of the rear assembly. The dogbone itself is over five times stiffer than the alloy version.

The carbon design and construction of the front triangle saves weight from the alu version, but most importantly increases stiffness by 50 per cent.

"These improvements produce more efficient climbing, but we know that racing is not just about going uphill. Races can be won on technical descents, so we improved the frame's descending qualities. To improve stability at speed we decreased our head angle to 69° to make the climbing position and handling spot-on.

"The extra stiffness improves tracking and minimises lateral flex in the swingarm and twist at the head tube. With all these improvements I believe Yeti can truly say that the full carbon AS-Rc is a purpose-designed race frame."

Ben and I cannot wait till they arrive...............

Flats Suck

Thursday night is Tour De Burbs for me. Bit over an hour of riding with a few nice hills to raise the heatrate. Throw in a big crew of riders all willing to smash it in the dog and you got the closest thing to a road race or crit I'm ever going to do.

Looking forward to it all day, remaining optimistic as the rain drenched the streets for most of the morning. Even the rain at 5pm couldn't deter me as all the Spoke(n) regulars pulled the pin.. I rolled to the meeting point happily dry(mudguards rule) and with no one there I decided to cruise the Kew Boulevard.

Half way back that familiar bouncy, rim smacking feeling from the back of the bike. Flat.

The universal symbol of surrender.... Roadbike upside down. No chance of getting on the ride now. I'm hoping that no one else showed.
So, what now. Ride home. Extend the ride a little but cause I now have no spares better to get home.
100m from home..... pshhhhhhhh. down again.
Guess it was never meant to be.