Dedacciai Force alloy tube

| 자전거 /공개 2009. 2. 12. 08:06

Posted by swlightn

7003 alloy (Al-Zb-Mg), triple butted with T6 heat treatment and K.E.T. (Kinetic Energy Treatment), which increases surface hardness and fatigue strength.

Very popular due to its lightness. Ideal for road, off-road and time-trial frames.

Weight: 1150g.

ALUMINUM MATERIALSDedacciai makes its tubes with the best aluminum alloy available today. Top quality performance is obtained with the use of SC 6110 A-T6 and 7003-T6 alloy whose breaking points easily reach 470 N/mm2 and which posses a surface hardness of 135 HV after aging and heat treatments. Heat treatment act on these high Cu-Zn-Mn content aluminum alloys to confer high quality mechanical properties and superior resistance to the cyclical stresses, competition frames and normally subjected too. What's more these special chemical compositions prevent stresses corrosion effects and facilitate welding. Thanks to their low sensitivity to temperature, they are particularly suitable when building complex, TIG-welded structures.

TECHNOLOGYDedacciai's drawing and differentiated thickness technology means varying requirements can be combined in the same frame. Examples of this are maximum lightness of the tubes, high mechanical properties and the unrivalled reliability of the finished product. Thanks to the high levels of plasticity in our alloys, we are able to obtain exceptionally slim sections and differentiated conical fittings with reduction values of over 50%. Maximum exploitation of these characteristics with the use of A.B.T. (Advanced Butt Technology) allows us to produce extremely light-weight tubes of high mechanical resistance. We also reduce thickness in areas least subject to stress. This means thickness may be increased in the zones subject to higher levels of mechanical and thermal stress as a result of heating due to welding. The introduction of Low Torsion Profile (L.T.P) also allows us to improve the structural resistance of each individual tube and thus that of the entire frame structure itself. All Dedacciai products are built to recent UNI-ENI 9000 series EU specifications for obtaining quality certification. They are a guarantee of total reliability and safety in every class of bicycle activity. The product cycle used a Dedacciai does not result in the emission of toxic or harmful fumes.

HEAT TREATMENTThe top working performance of the T6 version tubes are ensured by their final heat treatment, designed to bestow maximum resistance to breakage, yielding (plastic sag), knocks and repeated stress (fatigue resistance). Light allows heat treatment are based on a solubility variation in the solid state of some constituents. These are mostly inter-metalic compounds such as AuAl2 of Mg2Si in Aluminum, depending on temperature. Heat treatment to which Dedacciai subjects it tubes consists of a heating phase in purpose-built furnaces at a temperature form 450 to 460 °C, followed by fast cooling at a speed of 1 °C a second and then aging. This last phase is made up two thermal cycles, one of 8 hours at 95 °C and another of 16 hours, at 165 °C. All production procedures are conducted in strict conformity with current international norms and regulations. Ongoing technical research means we can now introduce Kinetic Energy Treatment. This is an avant-garde system involving the controlled transfer of kinetic energy to the tubes surface molecules. It obtains a 30% increment in mechanical resistance.

And

Alex A-Class ALX300 wheelset information (http://www.aclass-wheels.com/road_alx300.html)

| 자전거 /공개 2009. 2. 10. 08:48

Posted by swlightn

MODEL	ALX300 / ALX300 TRI

	FRONT	REAR
	300 700C 24H	300 700C 28H
	300 TRI 650C 24H	300 TRI 650C 28H

RIM	A-Class "EXA" material MATTE BLACK W/CSW W/SSE	A-Class "EXA" material MATTE BLACK W/CSW W/SSE

HUB	AXLE AL-7075 JAPANESE SEALED BEARINGS SANDED BLACK OLD: 100mm	AXLE AL-7075 JAPANESE SEALED BEARINGS CASSETTE FREEHUB FOR 8S, 9S, 10S SANDED BLACK OLD: 130mm

SPOKE	STAINLESS BLACK	STAINLESS BLACK

LACE	RADIAL 300 (281mmL) 300 TRI (256mmL)	R: 3 CROSS 300 (294mmL) 300 TRI (294mmL)
		L: 3 CROSS 300 (296mmL) 300 TRI (272mmL)

WEIGHT	300 740g	300 1030g
	300 TRI 720g	300 TRI 954g

HANDBUILT QUALITY

ROAD PRO

MTB

FREERIDE/DOWNHILL

BMX

CROSS + TREKKING

FOLDING BIKE

PARTS AND ACCESSORIES

RIM TECH

MATERIAL TECH

INNER TECH

SURFACE TECH

NEWS UPDATE

COMPANY STORY

CONTACT

DISTRIBUTORS

WARRANTY

SPONSORSHIP

WHEEL SET > ROAD PRO > ALX300 / ALX300TRI

| SPEED 1.0 | ALX280/ALX280TRI | ALX270 | ALX220/ALX220TRI | ALX200 | AKX 1.0 | AKX 2.0 |

MODEL	ALX300 / ALX300 TRI

	FRONT	REAR
	300 700C 24H	300 700C 28H
	300 TRI 650C 24H	300 TRI 650C 28H

RIM	A-Class "EXA" material MATTE BLACK W/CSW W/SSE	A-Class "EXA" material MATTE BLACK W/CSW W/SSE

HUB	AXLE AL-7075 JAPANESE SEALED BEARINGS SANDED BLACK OLD: 100mm	AXLE AL-7075 JAPANESE SEALED BEARINGS CASSETTE FREEHUB FOR 8S, 9S, 10S SANDED BLACK OLD: 130mm

SPOKE	STAINLESS BLACK	STAINLESS BLACK

LACE	RADIAL 300 (281mmL) 300 TRI (256mmL)	R: 3 CROSS 300 (294mmL) 300 TRI (294mmL)
		L: 3 CROSS 300 (296mmL) 300 TRI (272mmL)

WEIGHT	300 740g	300 1030g
	300 TRI 720g	300 TRI 954g

*Special Note: Paired spoke wheels are not available in North America.

And

우리 동네 연습 코스

| 자전거 /공개 2009. 2. 9. 05:23

Posted by swlightn

And

How much time does extra weight cost on Alpe d’Huez? (from http://www.training4cyclists.com/how-much-time-does-extra-weight-cost-on-alpe-dhuez/)

| 자전거 /Tech 2009. 2. 8. 17:08

Posted by swlightn

How much time does extra weight cost on Alpe d’Huez?

Ever wondered how much difference it would make if you made your bike lighter? I guess most serious riders once in while have concerns about their bikes whether they are light enough. As previously described the bike weight has impact on performance – especially during climbing. Thus, I thought it was interesting to find out how much difference it makes if you ride a heavier bike up alpe d’Huez. This little trial was performed by the best rider I coach as a part of his preparation for Tour de l’avenir (U23 Tour de France) in September.

In this experiment he had to ride up Alpe d’Huez four times with different setups. He was supposed to keep a pace around 275w on all four rides. The test bike was a Pinarello Prince equipped with Shimano Dura Ace and SRM crank:

1. Normal bike + 1.8L extra water in tyres(!)
This setup was quite interesting and got quite a lot of attention the day before when he had a puncture..! It was possible to fill 900ml into each tyre. Reducing weights on wheels is more important than reducing weight on non-rolling equipment e.g. bike saddle.

2. Normal bike + 1,8L extra water on bike.
This setup also got some serious attention because he rode a relative fast pace compared to most riders visiting Alpe d’Huez. Thus, when he performed the trial, well-trained riders were trying to keep up with his pace because this setup looked so extreme.

3. Normal bike
This setup was a completely normal bike.

4. Normal bike, reduced tyre pressure only 3 bars.
The last setup was ridden with reduced tyre pressure to 3bars. This was a tough finish on the last ride up Alpe d’Huez this day.

Results:
1. 52.01, 275w
2. 51.34, 277w
3. 49.40, 278w
4. 50.38, 273w

1,8L extra weight costs 1.54min up Alpe d’Huez. This is a remarkable test that shows us how important weight savings are when you are riding on steep hills. Also it shows that weight savings on wheels might be more important than weight saving on non-rolling equipment. These trials were only possible because of his SRM Crank that made it possible to compare each ride up the hill. You can make similar trials to test your bike setup if you want to optimize your bike equipment. These tests can be extremely helpful for e.g. time trialists if you don’t have wind tunnel in the neighbourhood.

Easton EA90 SLX 08 and 09

| 자전거 /공개 2009. 2. 7. 09:36

Posted by swlightn

<'08 >

EA90 SLX Clincher wheels

ascent II wheels

The EA90 SLX wheel set is hand-built for the rider/racer that refuses to compromise. Features include: New Gen 4 front/rear specific rims, Sapim™ double-butted stainless steel spokes, and new silky smooth R4 hubs. Easton’s ultimate lightweight clincher wheel set for climbing, sprinting and race-winning domination.

Wheel size	700C
Weight	700C - Front: 610 g, Rear 862 g, Pair: 1472 g
Hubs	R4-series. Black anodized finish. Precision-sealed cartridge bearings with asymmetrical, low-drag seals. Tool-free bearing preload adjustment front and rear.
Cassette Body	All alloy, oversized inboard ratchet mechanism with three pawls. Precision-sealed cartridge bearings with asymmetrical, low-drag seals. Shimano, Campagnolo, and SRAM 8/9/10 speed compatible.
Rims	Gen4. Black anodized shot-peen finish. Welded machined brake surface, 21mm front, 25mm rear. View rim profile.
Spokes	Sapim™ DB 2.0/1.7/2.0 stainless steel silver
Spoke Count	18 front, 24 rear
Nipples	External Nickel-plated brass rear drive side, custom-anodized aluminum non-drive side rear and front.

<'09 >
EA90 SLX Clincher
Best for: Hilly road racing and training

ascent II wheels

The EA90 SLX wheel set is hand-built for the rider/racer that refuses to compromise. Features include: New Gen 4 front/rear specific rims, Sapim™ double-butted stainless steel spokes, and new silky smooth R4 hubs. Easton’s ultimate lightweight clincher wheel set for climbing, sprinting and race-winning domination.

Wheel size	700C
Weight	1398 grams
Hubs	F-R4 SL, R-R4 SL
Spokes	Sapim™ double-butted silver 18F radial 24R radial / 2-cross DS
Nipples	Alloy Red RNDS: Alloy Red RDS: Alloy Red
Bearings	Grade 3 hybrid ceramic

And

8:58

| 자전거 /공개 2008. 12. 31. 02:48

Posted by swlightn

드디어 9분벽을 돌파했다.

15분대로 시작한 출근 시간, 드디어 8분대로 진입했다.

9분 18초가 마의 벽이었는데 오늘은 교차로에 한 번 걸렸음에도 불구하고
마지막 주차장에서 차들이 적은 관계로 속도를 약간 덜줄였던 것이 기록 향상에는 좋았던 것 같다.
8분 30초 이내가 가능할지는 모르겠지만 기록 측정은 계속해봐야겠다.