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Topics - Andy

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1
Other bicycles / MOVED: Amazon Aws
« on: January 10, 2017, 10:07:40 PM »

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Size           Item               Dia      Depth       Width   Type          ERD       Weight
12" -203   AR203-01    215mm   25mm   30mm   Clincher   172mm   140±10g

14" -255   AR255-01    270mm   30mm   30mm   Clincher   217mm   170±10g

16" -305   AR305-01    318mm   38mm   25mm   Clincher   249mm   190±10g
16" -349   AR349-01    361mm   38mm   23mm   Clincher   292mm   210±10g

17" -369   AR369-01    381mm   50mm   23mm   Clincher   288mm   280±10g

18" -355   AR355-01    370mm   38mm   25mm   Clincher   301mm   240±10g
18" -355   AR355-02    370mm   40mm   25mm   Clincher   297mm   350±10g

20"-406   AR406-01    418mm   30mm   30mm   Clincher   365mm   310±10g
20"-406   AR406-02    418mm   38mm   25mm   Clincher   349mm   350±10g
20"-406   AR406-03    418mm   38mm   23mm   Clincher   349mm   285±10g
20"-406   AR406-04    418mm   50mm   25mm   Clincher   398mm   310±10g

20" -451   AR451-01   461mm   50mm   23mm   Clincher   368mm   350±10g
20" -451   AR451-02   461mm   50mm   20mm   Clincher   368mm   320±10g
20" -451   AR451-03   461mm   35mm   23mm   Clincher   362mm   360±10g
20" -451   AR451-04   461mm   38mm   21mm   Clincher   356mm   355±10g
20" -451   AR451-05   461mm   38mm   23mm   Clincher   356mm   320±10g
20" -451   AR451-06   461mm   50mm   21mm   Clincher   368mm   365±10g

24" -507   AR501-01   507mm   23mm   30mm   Clincher   480mm   350±10g
24" -520   AR520-01   520mm   35mm   23mm   Clincher   467mm   360±10g


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Triathlon/TimeTrial Bicycle / MOVED: MOVED: Comp
« on: December 23, 2016, 02:21:42 AM »

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Other bicycles / MOVED: Comp
« on: December 23, 2016, 02:19:34 AM »

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TREK Bicycle frame size vs. height table for choosing and buying

1)MADONE / DOMANE ROAD SERIES

Road frame vs. height
470mm 155cm--162cm
500mm 160cm--167cm
520mm 165cm--172cm
540mm 170cm--177cm
560mm 175cm--182cm
580mm 180cm--187cm
600mm 185cm--192cm
620mm 190cm--197cm

2)MADONE WSD/DOMANE WSD/LEXA WOMEN ROAD

Road frame vs. height
430mm 150cm--160cm
470mm 155cm--165cm

3)MOUNTAIN/MOUTAIN BIKE SERIES(FUEL EX/REMEDY/ELITE/4 SERIES)

Mountain frame vs. height
15.5  155cm--165cm
17.5  165cm--175cm
19.5  175cm--185cm
21.5  185cm--195cm

4)29’’MOUNTAIN BIKE(SUPERFLY100/SUPERFLY/X-CALIBAR/COBIA/MANBA/MARLIN/WAHOO)

Mountain frame vs. height
15.5 155cm--165cm
17.5 165cm--175cm
19    175cm--185cm
21    185cm--195cm
23    195cm--205cm

5)26’’ MOUNTAIN BIKE(3 SERIES/SKYE)

Mountain frame vs. height
13    145cm--155cm
16    155cm--165cm
18    165cm--175cm
19.5 175cm--185cm
21    195cm--205cm

6)WOMEN MOUNTAIN BIKE WSD(MYNX)

Mountain frame vs. height
14     145cm--155cm
15.5  155cm--165cm

7)TOWN/URBAN LEISURE BIKE

Urban leisure bike frame vs. height
13          145cm--155cm
15/15.5 155cm--165cm
17.5      165cm--175cm
19/20    175cm--185cm
21/22    195cm--205cm

8)KIDS/KIDS BIKE

Kids bike frame vs. height
12   90cm--150cm
16 100cm--120cm
20 115cm--135cm
24 130cm--150cm

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Technical discussion / What is the difference for 3k, UD and 12k ?
« on: November 04, 2016, 04:38:19 AM »
The main type of carbon fiber used for the manufacture of bicycle parts are normal tow (under 12000 fibers) carbon fiber, like T700, or commonly known as 3k, 12k weave, and UD(uni-direction) carbon fiber.


Bicycle components, specifically carbon frames & rims are made using various grades of carbon fiber characterized mainly by their tensile strength and tensile modulus. Tensile strength is the amount of force needed to cause the fibers to break, while the tensile modulus is a measure of the carbon fiber's stiffness.

The cost of carbon fiber goes up with the increase in tensile strength, or increase in tensile modulus. And for carbon fiber weave also determines the cost of material with larger weave prepreg (eg.12k) costing less, due to the lower cost of manufacturing.

Carbon fiber layer(prepreg) has maximum strength only along the lengths of the fibers. That is why almost all the inside prepreg are using uni-directional carbon fiber while making carbon rims & frames. But the inside layup charts are still not identical. For example, the orientation are different( some are placed at 0 degree, some are 45 degree, 90 degree). This is very important to make carbon rims & frames with good strength & performance. That is also why using uni-directional fiber instead of woven carbon fiber (eg. 3k, 12k) creates stronger frames & rims.
Thus, the main use of woven carbon fiber is for appearance. But there is one mechanical benefit for 3k woven carbon fiber. Putting the 3k woven carbon fiber around hole area, it can prevent carbon fiber from laminating while machining holes.

For the weight difference, woven fiber has some area pass across each other. So, woven fiber is heavier than UD fiber. But, for rims, the size of carbon fiber is not large and only one layer different, the weight difference of woven fiber (3k &12k) and UD fiber is not big. Also, all rims have a weight range, for rims, it is +/-15g. So, sometimes, 3k rims & frames are lighter than UD.

For big size product (like frame), 3k frame will be heavier than UD. And for 12k, the weight different is not much difference.

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