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V3 Entry for Shimano105(R7000)
1) Pedaling with the BPK is lighter than normal derailleur because friction loss should be decreased.
Several customers reported their average speed increased more than 2km/h by their cycle computer.
2) You can use Outer/Low (front outer gear and rear inner gear) smoother than with normal derailleur. Or quite difficult to use like this with normal one.
When you ride a bike on the uphill road, once front gear changes inner then you should also change rear gear.
This means frequent and futile action will make time loss and to get tired. So the BPK makes you airily.
3) Aluminum6061 plates precisely machined cutting and light gray anodized.
4) SS derailleur can be used up to 30T rear cassette and GS derailleur up to 34T.
5)Weight Comparison (cages and pulleys only) ; Genuine 65g, Entry 78g
6) You will experience an obvious distinction. Please enjoy to ride a bike with the BPK !!.
FIT; Shimano 105 (R7000)
CAGE; Aluminum 6061 twin plates 2 mm thickness with light gray anodized.
PULLEY; 15T / 12T combination
Pulley material ; CH10(POM+CF10). A kind of plastic but stronger than original. Contains 10% carbon fiber.
Hybrid ceramic bearing installed.
Full ceramic bearings are selectable +6,000JPY
PULLEY COLOR; Material color of CH10. It seems a black with marble.
*Derailer is not included.
*Chain link must be added as combination of gears.
*You should ask skilled mechanic to install it.
More details,,, Click below
CDJ BIG PULLEY KIT ENGLISH SITE