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-   -   Ask Scrod (https://www.bikeforums.net/singlespeed-fixed-gear/769181-ask-scrod.html)

Dixie Gentleman 10-23-14 07:02 AM

Srod,


any frames similar to the super corsa pista? Wanting to build something classy. Just not that classy, maybe $1000 or a little more.

Scrodzilla 10-23-14 08:44 AM


Originally Posted by Owlex (Post 17241813)
Based on measurements that were taken yesterday, and a trusty bike fit calculator, it would seem that I will fit best on a 55 cm 2015 Leader 735 frame.

I'm only 5'7" ish, though... 55 seems large. I know that it's impossible for you to recommend a proper bike fit over the internet, but in keeping with what you know about Leader frames, would a person who's 5'7"-5'8" be dwarfed on a 55?

Considering that I'm 5'10" with long arms and ride a 55cm myself, I would say your measurements are wrong.

BrooklynTrack 10-23-14 10:06 AM

2 Attachment(s)
Scrod -

I'm building up a Steel Langster.

So far the parts list is like this:

Soma 456 38 or 40 cms, with white or black tape.
Silver cranks and black chainring - I am thinking sugino rd2? Sugino RD2 crankset | Retrogression
I also like this - IRD Defiant track crankset | Retrogression

Stem will be 70-90 mm Nitto or like kind.

My big question is the wheels and tires. What color scheme would you go with?
Al I have now is my frame, fork, headset, and an old campy seatpost I've had a while.

I guess I am really asking your opinion so I don't end up with a dorky looking bike. My main concern is how it rides, I will be riding NYC streets. However it would be nice if it looked boss as fk also. Thanks man

Here are some examples, and here is the wheelset I am thinking of.
Miche Pistard WR track wheelset | Retrogression

http://bikeforums.net/attachment.php...hmentid=413570http://bikeforums.net/attachment.php...hmentid=413571

Owlex 10-23-14 02:26 PM


Originally Posted by Scrodzilla (Post 17242395)
Considering that I'm 5'10" with long arms and ride a 55cm myself, I would say your measurements are wrong.


Thanks, thought something was off. Remeasured, and just ordered a 53 from you.

Now... we wait.


http://29.media.tumblr.com/tumblr_ll...0o1_r1_500.gif

Scrodzilla 10-24-14 10:57 AM


Originally Posted by BrooklynTrack (Post 17242733)
Scrod -

I'm building up a Steel Langster.

So far the parts list is like this:

Soma 456 38 or 40 cms, with white or black tape.
Silver cranks and black chainring - I am thinking sugino rd2? Sugino RD2 crankset | Retrogression
I also like this - IRD Defiant track crankset | Retrogression

Stem will be 70-90 mm Nitto or like kind.

My big question is the wheels and tires. What color scheme would you go with?
Al I have now is my frame, fork, headset, and an old campy seatpost I've had a while.

I guess I am really asking your opinion so I don't end up with a dorky looking bike. My main concern is how it rides, I will be riding NYC streets. However it would be nice if it looked boss as fk also. Thanks man

Here are some examples, and here is the wheelset I am thinking of.
Miche Pistard WR track wheelset | Retrogression

http://bikeforums.net/attachment.php...hmentid=413570http://bikeforums.net/attachment.php...hmentid=413571

Pistards are great wheels, can withstand quite a bit of abuse and will look good on a bike having silver or black components.

If it were my steel Langster and I was considering the Miche wheels, I'd also be choosing gumwall Pasela PT tires to keep it classy.

BrooklynTrack 10-24-14 02:47 PM


Originally Posted by Scrodzilla (Post 17246187)
Pistards are great wheels, can withstand quite a bit of abuse and will look good on a bike having silver or black components.

If it were my steel Langster and I was considering the Miche wheels, I'd also be choosing gumwall Pasela PT tires to keep it classy.

Thank you very kindly.

UltraManDan 10-29-14 08:11 AM

Is it normal when adjusting chain tension to have spots that are tighter and/or looser than others? Or does this mean something (chainring or cog) are out of round?

Scrodzilla 10-29-14 09:53 AM

Usually. You can try centering the chainring but it's very uncommon for everything but really high-end chainring to be slightly less than round.

Centering a Chainring | Velowood Cyclery

Muffin Man 10-31-14 10:47 AM

Scrod, have you ever worked with a white industries eccentric hub? I'm trying to decide what to do with the extra caad frame I have.

Thanks.

bones_mcbones 10-31-14 12:23 PM


Originally Posted by UltraManDan (Post 17259416)
Is it normal when adjusting chain tension to have spots that are tighter and/or looser than others? Or does this mean something (chainring or cog) are out of round?

how worn is your chainring? They don't wear evenly.

#notscrod #sorryscrod

UltraManDan 10-31-14 01:42 PM


Originally Posted by bones_mcbones (Post 17266147)
how worn is your chainring? They don't wear evenly.

#notscrod #sorryscrod

Brand New. Just installed SRAM S300 crankset and chainring and an All City cog. I'm just running it with more slack for now, so it doesn't bind.

bones_mcbones 10-31-14 02:13 PM


Originally Posted by UltraManDan (Post 17266352)
Brand New. Just installed SRAM S300 crankset and chainring and an All City cog. I'm just running it with more slack for now, so it doesn't bind.

that is troubling.

Scrodzilla 10-31-14 02:31 PM


Originally Posted by bones_mcbones (Post 17266418)
that is troubling.

Not really. As I've already said when I answered his question, it's pretty common for lower-end chainrings to be out of round.

ufbeans 10-31-14 05:03 PM

Evening Sir Scrod,

I'm riding a pake with one of your straight blade forks through the streets of Chicago and love the twitch and handling for getting between and around cars. On part of my commute I have a pretty fast downhill section that I'd like to skid slow down on and even throw the tail out a little but I'm a little nervous to get too far up on my handlebars do to the sensitivity of the bike and given the speeds involved. I'm using some bullhorns right now. Can you recommend another bar setup that would allow me to get more on top of the bike safely and where my brake should be just in case ha.

Scrodzilla 10-31-14 05:33 PM

Why not just use a different hand position? You don't need to be busting high-speed skids with your hands way out on the horns.

50voltphantom 11-04-14 09:23 PM

Scrod,

I plan on building some new wheels with Phil hubs and a White Industries freewheel. If I pair these with a Sugino 75 crank, do I need to compensate for the difference in chainline due to the freewheel?

SheldonBrown.com says that Phil's plus a EAI cog results in a 43.48mm chainline whereas a Phil's plus a White Industries freewheel results in a 45.48 chainline. Would I want to use a 111mm BB instead of the recommended 109mm? Thanks in advance.

Scrodzilla 11-04-14 09:31 PM

I wouldn't bother. I've never lost a wink of sleep over a chainline being off by 2-3mm.

50voltphantom 11-04-14 09:36 PM


Originally Posted by Scrodzilla (Post 17277640)
I wouldn't bother. I've never lost a wink of sleep over a chainline being off by 2-3mm.

Thank you. Theoretically, does my reasoning make sense? I'm new to the Euro BB/varying chainline thing.

Scrodzilla 11-05-14 12:29 AM

It makes perfect sense, but doesn't really matter enough to worry about.

50voltphantom 11-06-14 07:46 AM

Would it work to mate 75's with a Campagnolo Pista BB or is that asking for trouble?

IAmSam 11-06-14 09:18 AM


Originally Posted by 50voltphantom (Post 17281148)
Would it work to mate 75's with a Campagnolo Pista BB or is that asking for trouble?

But...but...that's 85g more than a Phil Wood BB ;)

T13 11-06-14 09:38 AM


Originally Posted by ufbeans (Post 17266802)
Evening Sir Scrod,

I'm riding a pake with one of your straight blade forks through the streets of Chicago and love the twitch and handling for getting between and around cars. On part of my commute I have a pretty fast downhill section that I'd like to skid slow down on and even throw the tail out a little but I'm a little nervous to get too far up on my handlebars do to the sensitivity of the bike and given the speeds involved. I'm using some bullhorns right now. Can you recommend another bar setup that would allow me to get more on top of the bike safely and where my brake should be just in case ha.


:twitchy:

Scrodzilla 11-06-14 11:34 AM


Originally Posted by 50voltphantom (Post 17281148)
Would it work to mate 75's with a Campagnolo Pista BB or is that asking for trouble?

As long as the spindle is ISO square-taper, you can use any brand BB you'd like.

Using a Campy Record Pista BB with 75s will move each crank arm out a whopping 1mm.

50voltphantom 11-06-14 12:51 PM


Originally Posted by Scrodzilla (Post 17281757)
As long as the spindle is ISO square-taper, you can use any brand BB you'd like.

Using a Campy Record Pista BB with 75s will move each crank arm out a whopping 1mm.

I see. Learning a lot. Thanks again.

Scrodzilla 11-06-14 12:58 PM

No prob! :thumb:

To complicate matters even further (though not really), you can safely use an ISO crankset on a JIS spindle too, which results in a 2-3mm width increase on each side. Example, using a 107mm JIS spindle with a crankset requiring a 109mm ISO spindle would result in what would seem like having a 111-113mm spindle. Oh, physics...

See here.

T13 11-06-14 01:05 PM


Originally Posted by Scrodzilla (Post 17282097)
To complicate matters even further (though not really), you can safely use an ISO crankset on a JIS spindle too, which result in a 2-3mm width increase on each side. Example, using a 107mm JIS spindle with a crankset requiring a 109mm ISO spindle would result in what would seem like having a 111-113mm spindle. Oh, physics...

See here.


Im glad you posted this. I've been trying to find a cartridge BB 68x112 for my Campy Stradas, and haven't found too much. That opens up alot more possibilities.

Scrodzilla 11-06-14 01:11 PM

A 111mm ISO won't work? You should be able to use a 107mm JIS spindle and get similar results.

edit: However, a Strada crank I recently put on a customer's bike needed a 115mm ISO spindle to get a good chainline and clear the chainstay (set up with a single chainring).

T13 11-06-14 02:36 PM


Originally Posted by Scrodzilla (Post 17282133)
A 111mm ISO won't work? You should be able to use a 107mm JIS spindle and get similar results.

edit: However, a Strada crank I recently put on a customer's bike needed a 115mm ISO spindle to get a good chainline and clear the chainstay (set up with a single chainring).


Ugh, i hate "howevers". haha

So yer sayin i probably need the same, a 115 ISO? I found the spec for the BB online Here:

http://velobase.com/ViewComponent.as...f-190893afb431

Scrodzilla 11-06-14 03:47 PM

Yes sir. When the dude came in with that crank, I immediately thought 111mm ISO but there were clearance issues way before I even tightened the crank arm bolts down. I highly doubt that .5mm on each side would be enough.

We've got 115mm Campy Veloce BBs in stock for the same price as the 111mm on our site. Give me a holler if you need one.

T13 11-07-14 09:22 AM


Originally Posted by Scrodzilla (Post 17282572)
Yes sir. When the dude came in with that crank, I immediately thought 111mm ISO but there were clearance issues way before I even tightened the crank arm bolts down. I highly doubt that .5mm on each side would be enough.

We've got 115mm Campy Veloce BBs in stock for the same price as the 111mm on our site. Give me a holler if you need one.

Ok cool, I wont be able to order til next Friday, but i'll def do that. Can you get the tool for it as well, at a decent price? That's one tool i don't have.


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