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

Scrodzilla 09-07-14 10:43 AM


Originally Posted by dimethi (Post 17107314)
Hey Scrod,

I'm looking to build a custom wheelset with Kinlin XR270 rims at Retrogression while I'm in SD to replace my 'veeps', and was wondering at 140lbs (on my way to 145-150) and commuting/street riding, would it be reasonable for me to have 20/28 for the spoke count? If not, what do you suggest? (24/28, 28/28, etc?)

The streets where I'm located are alright, (Davis) basically like this, except with a couple more cracks. Nothing too crazy.

Also, what's the difference between road front hubs and fixed gear front hubs? I found these road hubs that are pretty light (<100g), but fixed gear front hubs from novatec/miche/formula are a lot heavier(>220).

Thanks a ton!

We don't stock Kinlin rims anymore but we may still be able to order them from one of our oddball vendors. I would need to check on that, though.

Spoke count is entirely up to you. I'm not a huge fan of low spoke counts but I would think 24/28 would be fine.

You already answered your own question about the difference between road and track hubs. Road hubs are generally lighter because roadies are weight weenies. :)

ianjk 09-08-14 11:01 AM

Hey Scrod, haven't been on BD for a while, but my life is basically without purpose these days, someone has stolen (or maybe I lost) my "Truth in Reality" shirt. No more superpowers, no more supermodels, can't even get out of bed most days. Do you have an extra laying around?

Scrodzilla 09-08-14 11:26 AM

I don't, man. Sorry!

dimethi 09-08-14 07:41 PM

Probably the last update on the whole 2015 Leader 725 ordeal:

The replacement frame came today, after I was denied a replacement/warranty because I was told the frame I received was acceptable (see page 357 for story). It was only until I found a divot in the bottom bracket shell, that they sent me another frame. The frame I received appears to be structurally sound. However, there are still welding imperfections, and a tooth-sized piece is missing from the welding from where the top tube and down tube connect to the head tube. I doubt I'll be able to get another replacement, as it took an insane amount of effort to even get this one. Pictures are attached: Head tube weld , and Brake bridge weld

tl;dr: Hassle to get a replacement frame, even when I sent pictures of welding imperfections. Finally got it replaced because part of the BB was melted off. New frame comes, structurally sound but cosmetically even uglier. I've had Leader frames before (2007 735TR and 2010 725) and none have had this problem.

Flatulentfox 09-08-14 09:46 PM

Ehh. Those aren't great and neither are the welds on your previous frame. However neither were/are unsafe. It's about what I would expect from a budget Chinese frame. I'm not surprised that they were reluctant to issue a replacement. .

europa 09-09-14 03:13 AM


Originally Posted by ianjk (Post 17111107)
Hey Scrod, haven't been on BD for a while, but my life is basically without purpose these days, someone has stolen (or maybe I lost) my "Truth in Reality" shirt. No more superpowers, no more supermodels, can't even get out of bed most days. Do you have an extra laying around?


Originally Posted by Scrodzilla (Post 17111188)
I don't, man. Sorry!

Hey Scrod, is this one of those questions that makes it so wonderful to own a bike shop?

bmontgomery87 09-09-14 05:34 AM


Originally Posted by Flatulentfox (Post 17113361)
Ehh. Those aren't great and neither are the welds on your previous frame. However neither were/are unsafe. It's about what I would expect from a budget Chinese frame. I'm not surprised that they were reluctant to issue a replacement. .

Agreed.
While they aren't beautiful welds, I'm not really sure what you expect from a 500ish dollar frameset. If you're riding your bike, it will get scratched, and dented.
If you aren't stoked on quality, there are 10 other companies that make almost identical frames but probably have worse customer service....

Xgecko 09-09-14 06:24 PM


Originally Posted by Scrodzilla (Post 17108113)
CR-18s are awesome. At 205 lbs myself, I use them on my townie without any issues at all.


Damn Scrod that is a sweet old bike....oh yeah and I agree CR-18's are great and one one of my favorite rims

Mumonkan 09-09-14 07:50 PM

ive put my cr-18s through hell and they barely needed any truing at all and have not caved in or sploded

serious offroad that i have no business being on with slicks, 167 mile climbing rides, daily commuting, on a 35lb bike (most likely closer to 40) and im 155

adamjab 09-13-14 10:16 AM

Hey Scrod,

If I am replacing a chainring on a one-piece crank will any one-piece chain ring fit the crank arm?

TejanoTrackie 09-13-14 12:33 PM

Interbike report ?

Scrodzilla 09-13-14 12:55 PM

Interbike and the King of Vegas race were awesome but we've got an absolutely insane amount of orders to catch up on here at the shop so I probably won't be on here much today.

We did manage to post a few pics on our Instagram but we didn't take nearly enough.

TejanoTrackie 09-13-14 01:07 PM

That Leader Cure looks interesting.

Also, is the new Cretin meant to replace the discontinued 721 ? The DT looks more round though.

europa 09-13-14 07:48 PM


Originally Posted by adamjab (Post 17126386)
Hey Scrod,

If I am replacing a chainring on a one-piece crank will any one-piece chain ring fit the crank arm?

Scrod's mentioned he's busy, so I'll give a quick answer. Read up on BCD - it's the diameter of the chainring mounting bolts. It's a regular thread on here so you should find answers.

TejanoTrackie 09-13-14 08:20 PM


Originally Posted by europa (Post 17127610)
Scrod's mentioned he's busy, so I'll give a quick answer. Read up on BCD - it's the diameter of the chainring mounting bolts. It's a regular thread on here so you should find answers.

I think it's a one-piece, aka Ashtabula, crank which has no spider, where the chainring slides on the left side arm and is held in place with the stationary cone and a pin cast on the inside of the right crank arm. They were common on old Schwinn Varsities and other models, but I'm not sure if they are interchangeable with other brands. Google Ashtabula and read one of Sheldon Brown's articles in the subject. Cranks with spiders, where bcd is an issue, are commonly referred to as 3-piece cranks (left crank arm, bottom bracket, right crank arm).

Dannihilator 09-13-14 10:49 PM


Originally Posted by TejanoTrackie (Post 17127711)
I think it's a one-piece, aka Ashtabula, crank which has no spider, where the chainring slides on the left side arm and is held in place with the stationary cone and a pin cast on the inside of the right crank arm. They were common on old Schwinn Varsities and other models, but I'm not sure if they are interchangeable with other brands. Google Ashtabula and read one of Sheldon Brown's articles in the subject. Cranks with spiders, where bcd is an issue, are commonly referred to as 3-piece cranks (left crank arm, bottom bracket, right crank arm).

Certain 1 piece cranks are truly 1 piece where the chain wheel is permanently fixed to the crank.

Scrodzilla 09-14-14 10:06 AM

Yeah, that's a difficult question to answer without knowing exactly what he's got.

adamjab 09-14-14 12:47 PM

Yeah it's an Ashtabula crank. I have the old dual chainring off. Just want to get a single, 44t chainwheel for it. Like this one: [img]41BH2-osBGL.jpg[/img] Looking at a sheldon brown article he states that they are almost all interchangeable so I guess I'll take his word for it. :) Unless of course someone else has had a different experience.

adamjab 09-17-14 07:00 AM

Went to a cool, oldschool, local bike shop that got me sorted out with a cool blue and chrome 44t chain ring that fits like a dream.

Shotland 09-17-14 10:05 AM

1) Thinking about building a pake rumrunner as a commuter. How are these framesets?

2) I have DA 7600 cranks, which work best with 108mm JIS BBs. Would a UN55 107mm be alright, or is it best to overshoot if you can't find the right length?

Scrodzilla 09-18-14 12:46 PM


Originally Posted by Shotland (Post 17138348)
1) Thinking about building a pake rumrunner as a commuter. How are these framesets?

They're excellent for the money.


Originally Posted by Shotland (Post 17138348)
2) I have DA 7600 cranks, which work best with 108mm JIS BBs. Would a UN55 107mm be alright, or is it best to overshoot if you can't find the right length?

Square taper version of the 7600 is ISO, not JIS. The correct spindle for that crank is 109mm ISO. Read this.

Shotland 09-18-14 03:23 PM


Originally Posted by Scrodzilla (Post 17142156)
Square taper version of the 7600 is ISO, not JIS. The correct spindle for that crank is 109mm ISO. Read this.

Huh. Ok. So this is weird. I used to run my DA cranks on a UN73. Ran that combo for thousands of miles with no problems. did I maybe ruin my cranks?

Also- is there a non square taper version of 7600?

Scrodzilla 09-18-14 03:49 PM


Originally Posted by Shotland (Post 17142580)
Huh. Ok. So this is weird. I used to run my DA cranks on a UN73. Ran that combo for thousands of miles with no problems. did I maybe ruin my cranks?

Quite possibly, especially if you're a hamfist.


Originally Posted by Shotland (Post 17142580)
Also- is there a non square taper version of 7600?

I had the numbers mixed up. The 7710 is Octalink, the 7600 is square taper.

Shotland 09-19-14 08:48 AM

All city thunderdome for the track. Good buy, or bye bye? How do you like yours? Anything about it you're not a fan of?

Scrodzilla 09-19-14 09:23 AM

There is very literally nothing I dislike about the Thunderdome. It's light, stiff and the geo is just right (for me, anyway).

Considering it was designed to be ridden on the track, I can't see why it would be a bad choice.


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