terrenceterrenc

any differences between using those 2 on a fixie?

i do see alot of ppl craving for the suginos but does it make a difference in any way: weight or etc?

cheers

reedreeder

length is the most important part. most track cranks are 165mm, which gives better ground clearance. track cranks are also a different BCD (bolt circle diameter). Sugino 75's are popular because they're stiff and beautiful.

mihlbach

While length is important, most road and track cranks are available in a variety of lengths, usually in 2.5 or 5 mm increments, from 165mm to 175mm. So in that regard track and road cranks are not different.
For all practical purposes, you will notice little difference between track and road cranks. If you use a track hub and track crank, paired with the correct BB you'll have an easier time achieving a straight chainline. Thats about the only benefit of track cranks used on the road.

wroomwroomoops

Most track cranksets use 144mm BCD, while most road doubles use 130mm BCD. There are many exceptions to this, though, like the very popular Sugino RD Messenger with 130mm BCD. (if I mention that the TokyoLoco is 130mm BCD as well, will I start a flamefest? Let's see....)

killsurfcity

the only real difference is five little 1/8 inch tabs. you can get a equal quality hype free road double crank on ebay for a 1/4 of the price of a track crank.

wroomwroomoops

To be honest, I don't know any cranksets that are marketed for road usage, that would come in 144mm BCD. Campa used to have one model, long time ago. You would be hard pressed to find road chainrings in 144mm BCD.

terrenceterrenc

since we are here i might as well ask....

what's the difference between a track specific BB to a road BB?

cheers

wroomwroomoops

Apart from the width that, in the case of track chainlines, is narrower, there's no difference between the two.

mihlbach

There is not necessarily any mechanical difference. Many, but not all track bottom brackets are unsealed to meet NJS (Japanese Keirin) requirements. However, many cranks and BB are meant to be pairs. For instance, the sugino 75 BB and crank will give you the standard 42mm chainline which will match a track hub. Using the same crank with another BB will not guarantee this because the spindle may be a different length and/or the taper of the spindle may differ. One the other hand, road cranks and bottom brackets are not necessarily designed to yield a 42mm chainline. There is a good chance you can achieve the right chainline with any crank, but if you choose a road crank you might have to do some experimenting with different bottom brackets, or just accept that you chainline will be a few mms off.

terrenceterrenc

thanks....apreciate allt he replies. still a noob in the fixie scene.

so anyone here using an unsealed njs certified bb?

how long is the service interval and also how is it compared to a sealed one; rolling smoothness and weight?

cheers

c0urt

there are a lot of guys on the board using road doubles in place of track cranks and they work wonderfully

ozfix

Hey i have those cranks, 170 strada i think they are called. Do you know how old these would be?

wroomwroomoops

Yeah, I think you're right, they should be the Campagnolo Strada! I have no clue, never seen them in real life. But I do feel they're quite unique. Do you have the original chainring(s), too? If you do, I'd be very graterul if you could post/send a pic of that chainring. Or at least describe the construction of it.

jussik

There's plenty of old road cranksets with 144bcd, altough many of them seem to be originally Campy copies. Stuff like Sugino Mighty, older Dura-Ace and Shimano 600 too, Ofmega, SR etc. Too many to mention, actually. Check out Ebay and you'll see.

orangepaint

Anything wrong with using a road double on the track?

edit: I know it'll be harder to find quality chainrings in the proper BCD

acoldspoon

144 BCD:
Campy Record (NR, Record, CR, ect)
Most Campy copies including most Italian cranks from the 80's and 90's
Most Sugino single and double chainring cranks from the 80's and 90's
Mavic starfish cranks, IIRC
****mano Dura Ace track

Finding 144 BDC cranks is beyond easy. Finding inexpensive 144 BDC chainrings, notsomuch.

jodypolk

yeah, i rock a campy record road double, chainline's perfect with ring on the outside, coupled with centaur bb (108 i think?), 144 BCD



i think they look better than pretty much any crank out there.

maldekai

hijacking sorry,
BCD is being thrown around a lot. What is that an acronym for?

jodypolk

it's posted above (bolt circle diameter)

https://en.wikipedia.org/wiki/Wheel_sizing#Bolt_circle

wroomwroomoops

Not all of those you listed is/was marketed as road crankset.

jodypolk

YaGonna

Take a look at posting #2.

mihlbach

Not long ago all bottom brackets were unsealed..people rode them on the road, on the dirt, in the rain, etc. so its not really a major issue. Service interval depends on the conditions you ride it in, but I would say 1-2 times a year. Weight wise, it depends on the materials, but assuming both are made of steel, on average an unsealed BB is probably a little lighter than a basic square taper sealed BB, but barely so. A good quality unsealed BB will be smoother than a sealed BB.

mihlbach

You might attract an occasional insulting remark from some track snob, but other than that, a road crank should work fine on the track.

mander

Really? I thought that street fg h------s were the only ones who cared about that.