eddiebrannan

no. they get upgraded

sniks

moderatly priced cranks will last too but you will not WANT moderatly priced cranks forever.
then you will have a corner of you house filled with moderatley prided parts that you never use.
but they will last forever. like styrofoam.

dirtyphotons

edit: i'm quite possibly wrong about 75s being iso

shimano makes the un53 bottom bracket and it's a different taper(JIS) than the sugino 75(ISO).

yes, the cranks will go on, no they probably wont break but it's not the part they were designed for. if you're going to drop that much coin on a crankset for durability reasons, it's probably worth using the right kind of bb.

andre nickatina

Wait a sec... are you sure? I swear I researched this exact thing the other day and lost a few hours in the process, to come to the final conclusion that if you don't want to go for the S75 cranks, the Shimano UN52/53's are the next best bet... ****. I guess I'll have to look back in on that one.

By the way yeah I meant to say Shimano up there next to UN53 instead of Sugino, brain fart.

edit: Yeah, just checked. The UN53 can be had in ISO/English threading from Harriscyclery.

dirtyphotons

edit: i think this is wrong, see my later post.

un53 is a good bottom bracket, quality's not the issue. one is jis, and one is iso. the iso cranks will not mate onto the jis spindle as far as they should for optimum part life (and optimum power transfer).

the cranks will fit on, you can tighten the bolts, and it'll almost certainly work fine. but if i'm going to spend that much money, i don't want a part that "works fine" but one that works as well as it is designed to.

dutret

Ehhh unless you are upgrading for bling njs hipster points an outdated crankset like the 75 isn't much protection against pointless upgrading and it's better to have a corner full of moderately priced parts that would work great on a beater then high end ****.

baxtefer

naw the two frames are equally crappy. KHS flite/bianchi castro valley.

baxtefer

since when were S75's ISO?
this debate comes up every month....

dirtyphotons

yeah, i'm starting to remember now.

i have a nasty habit of going by the mfg website (here) but i'm recalling that some thought it was a typo/mistranslation/wrong.

if so i apologize for misleading you op.

Aeroplane

Somebody saw it on their website. I'll link it again to renew the debate....
https://www.suginoltd.co.jp/track_e.html

andre nickatina

I'm so confused... so the MFG site for Sugino had a TYPO that S75's are ISO, when they're really JIS? Because UN53's are definitely ISO English threading...

I swear there's a 3 page thread on here saying if you don't want to go for the S75 BB, the Shim.UN53 is your next best bet for fit (I wasn't talkig about quality earlier).

sniks

not for hipster points just for love of owning something you really want and not settled for.
like I have, and I have wasted money doing that.well not wasted I guess, i give them to the friend who don't have money to waste. or to broke friends that are just checking it out (the fixed thing) until they get there own bikes.

my wife has Iro canks and I ride her bike and they are fine and good she wanted black cranks( because thats the look that was important to her) and but I don't want them on my bike because I like the way the 75's look.

ps I like my bling NJS hipster *****e and it rides smoooooth too.

bonechilling

What are you talking about? What improvements have been made
that make Sugino 75 cranks outdated? Riders at practically all levels
of the sport are still using the 75s.

dirtyphotons

haha, as if it couldn't get more confusing.

shimano un53 is iso english threading (where it screws into the frame) and the spindle (where it mates with the cranks) is jis taper. i'm not sure i even want to know why...

as far as the typo, yes, that's what was suggested. i cannot verify the taper from personal experience/measurement. any bike shop employees out there wanna do a favor?

queerpunk

from what i've read in the past - sorry i can't cite my sources - S75's taper falls between JIS and ISO. i think the folks over at phil wood may have written a bunch on this (did i pull that out of thin air?). anyway, for this reason i would do one of two things - either use S75's with the recommended 109mm, wacky-proprietary bottom bracket, or use another BB, either ISO or JIS, but STICK WITH WHAT YOU USE. if you go from ISO to JIS and back again, you run the risk (don't know how great it is) of deforming the cranks' spindleholes.

caveat, this is just speculation.

dutret

square taper. They are perfectly fine cranks but so are rds unless you are a strong sprinter or a super-clyde. If you actually have a performance based upgrade compulsion(rather then a hipster conformity one) then there is no reason why you would be satisfied with an outdated tech like square taper after external bearing hollow spindle crank sets become available. If you just care that stuffs works well then you aren't settling for the RDs you are buying a much more cost effective crankset.

trons

probably a reference to external bearing cranks

aal

I think the RD looks better than the 75.

Retem

fmf also makes a square cranks arm set

Retem

right I have a set of "high end cranks" and I hate em however I love my old sugino gs cranks they were a double that I filed the tabs off of on my conversion and I prefer squares because I have several 30+ yr old bb that are still in very good shape with very little maintenence

edit: if you have to have 144bcd just find an old set of sugino gs cranks and pair that with a 110mm bb it works for me and it looks good anf trackish on my road bike conversion hah

roadgator

if you guys were really going for stiffness you'd get a modern crankset with an integrated oversize axle and external bearings like shimano 10spd and FSA cranks.

regardless of how stiff your cranks are, a square taper BB quickly becomes the limiting factor. from an engineering standpoint the new sets are supperior.

just dont be in denial about liking the style of 75's...

andre nickatina

Is that some kind of devious conspiracy by Shimano to trick people into only buying Shimano for their drivetrains?

But yeah, looking over older threads it seems a lot of people on here run 75's with a Shimano UN53 107mm BB, no problems or minimal, irrelevent imperfection in the chainline. But then again, my current beater conversion doesn't have the most perfect chainline either.

Telix

So what crankset would you suggest for a fixed gear application?

barba

I kind of agree

Accident

to each his own...
I have both and since I weigh 160lbs + 15lb lock + ??lbs in bag i notice the flex when i sprint around on the RD's, not that its awful or anything, but noticeable compared to the 75's I have on my track bike. If you're considering 1/8" with the RD, go with the stronglight chainrings that John and businesscycles is selling but keep in mind that the RD's are setup for 2 chainrings; not to make blind assumptions, but I think it might lower the tolerance for high torque. Go with the 75's, you'll love 'em to death.