The reason why there are no backache and knee pain by using DOVAL chainring

[박정빈]

 since I have used DOVAL chainring, my backache and knee pain are relieved so much

I wondered how to explain this phenomenon, and i found the reason when i saw a medical TV program and captured that

 Although My bike had given health to me, but backache and knee pain were still remained  

it was not gotten over 

especially, knee pain gave me the choice of giving up riding.

For the last hope, I used DOVAL

after installing DOVAL chainring, my knee pain was relieved so much than i had respected!!!

after three month, my hip muscle is much stronger than before.

then my terrible backache has gone by building up hip muscle ~ ^^

** bike's speed up and increasing of up-hill ability are bonus XD **