Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: this is 68mm english thread?
Document: i swapped this out with my triple chainring and lost about 100g. excellent quality, came with the bottom bracket. i had 165mm cranks and the swap to 180s. i averaged 240 wt for first ride with them, which is up from 200 wt for the last 4 months. these are intended for riders with 33&#34; and longer legs, or 18&#34; or longer femur.
but with the 34t all to the left i can still climb a 10% grade at 80 cadence with a 28t cassette. also the spacing of the chain ring allows me to use more of my 10sp cassette cause the chain doesnt chatter on the front derailed. i love it.
While I still use the Cranks that originally came with the Crankset, I had to replace the chainring within 4 months (~1000 miles) due to the outer ring being warped.Please note that I am a larger guy @ 6'9" 200lbs. That being said, these should have held up given that I'm a fairly new/weak rider (had only been riding for 10 months when these went).
I installed this on my 1984 KHS Competition 68cm bike, which was originally a 10-speed road bike (5 in the back, 2 up front).I converted it over about a year ago to a full Dura-ace 7700 STI group (9 in the back, 2 up front). But the crankset it came with was stupid short for someone my height (6'5&#34;) with long legs, I think it was a 171 or 172.5 cranklength.
I especially feel extra power going up hills, and the 34t small ring made a huge difference in being able to keep spinning at higher rpm's while climbing.
Answer: no