Go Back  Bike Forums > The Racer's Forum > "The 33"-Road Bike Racing
Reload this Page >

SRM DA crank arms not interchangeable?

"The 33"-Road Bike Racing We set this forum up for our members to discuss their experiences in either pro or amateur racing, whether they are the big races, or even the small backyard races. Don't forget to update all the members with your own race results.

SRM DA crank arms not interchangeable?

Old 12-07-09, 09:17 AM
  #1  
Doggus
half man - half sheep
Thread Starter
 
Doggus's Avatar
 
Join Date: Apr 2005
Location: Allen (Dallas), TX
Posts: 2,453
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
SRM DA crank arms not interchangeable?

Saw a Q/A on an recent ebay ad where someone asked if they could switch the 170 DA crank arms with their own 175 DA crank arms. Response was a solid NO. I believe the seller was a bike shop so I'm guessing they would know.

Anyone here (you know, racers, who actually use these things) have the DA SRM and swapped out the crank arms for a different length?
Doggus is offline  
Old 12-07-09, 09:30 AM
  #2  
Racer Ex 
Resident Alien
 
Racer Ex's Avatar
 
Join Date: Jul 2007
Location: Location, location.
Posts: 13,083
Mentioned: 154 Post(s)
Tagged: 0 Thread(s)
Quoted: 346 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Doggus View Post
Saw a Q/A on an recent ebay ad where someone asked if they could switch the 170 DA crank arms with their own 175 DA crank arms. Response was a solid NO. I believe the seller was a bike shop so I'm guessing they would know.

Anyone here (you know, racers, who actually use these things) have the DA SRM and swapped out the crank arms for a different length?
Haven't done it but if you want to check it out feel free to swing by and take a look at mine. The non drive side is obviously no issue.
Racer Ex is offline  
Old 12-07-09, 09:30 AM
  #3  
Grumpy McTrumpy
gmt
 
Grumpy McTrumpy's Avatar
 
Join Date: Sep 2008
Location: Binghamton, NY
Posts: 12,509
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 44 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I have an SRM DA. The drive-side crank is permanently attached (at least as far as the end user is concerned).
Grumpy McTrumpy is offline  
Old 12-07-09, 09:45 AM
  #4  
ridethecliche
Village Idiot
 
Join Date: Jan 2007
Location: Bahstaaaaan
Posts: 20,247
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Yup, you can't do it.
The spider is part of the DS Crankarm.

If you bought a SRM octalink one, you could swap it out. I think their ST campy ones might be interchangeable as well.
ridethecliche is offline  
Old 12-07-09, 10:17 AM
  #5  
carpediemracing 
Senior Member
 
Join Date: Feb 2007
Location: Tariffville, CT
Posts: 15,087

Bikes: Tsunami Bikes

Mentioned: 33 Post(s)
Tagged: 0 Thread(s)
Quoted: 260 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Yep, ST Campy ones are interchangeable too.

So are the BB30 Cannondale SI arms. It takes about 5-10 minutes to swap out the SI arms (and pedals) if I'm thinking straight, and 30 if I'm not and try and break things by accident (like trying to use the "stop" to pull the crank, instead of the pull fitting).

The one piece SRM sets are not interchangeable, like the DA. I dunno about the other ones (FSA etc).

cdr
carpediemracing is offline  
Old 12-07-09, 11:17 AM
  #6  
DrWJODonnell
Slow'n'Aero
 
DrWJODonnell's Avatar
 
Join Date: Feb 2006
Location: Driving the pace in the crosswind
Posts: 2,599
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I agree with RacerEx on this one. While it may be possible, I emphasize POSSIBLE. fror 99.5% of the populace you can only change one crank arm.
DrWJODonnell is offline  
Old 12-07-09, 11:38 AM
  #7  
The_Cretin
Pedalphile
 
Join Date: Jan 2008
Location: Boulder, CO
Posts: 258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts






....
The_Cretin is offline  
Old 12-07-09, 12:12 PM
  #8  
Grumpy McTrumpy
gmt
 
Grumpy McTrumpy's Avatar
 
Join Date: Sep 2008
Location: Binghamton, NY
Posts: 12,509
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 44 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
^ warranty now void.
Grumpy McTrumpy is offline  
Old 12-07-09, 12:20 PM
  #9  
Doggus
half man - half sheep
Thread Starter
 
Doggus's Avatar
 
Join Date: Apr 2005
Location: Allen (Dallas), TX
Posts: 2,453
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
o Non-user serviceable battery
o Non-changeable cranks arms
o Stagnated product


How are people liking the Quarqs?
Doggus is offline  
Old 12-07-09, 12:24 PM
  #10  
bdcheung
Carpe Diem
 
bdcheung's Avatar
 
Join Date: Sep 2006
Location: MABRA
Posts: 13,149

Bikes: 2007 CAAD9; 2014 CAADX; PedalForce CG1

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
they make a Dura-Ace quarq cinqo?
__________________
"When you are chewing the bars at the business end of a 90 mile road race you really dont care what gear you have hanging from your bike so long as it works."
ΛΧΑ ΔΞ179 - 15% off your first Hammer Nutrition order!
bdcheung is offline  
Old 12-07-09, 01:03 PM
  #11  
The_Cretin
Pedalphile
 
Join Date: Jan 2008
Location: Boulder, CO
Posts: 258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Grumpy McTrumpy View Post
^ warranty now void.
1) The warranty on my DA SRM expired a long time ago.

2) Those arms were bought off of eBay. The arms on my SRM have never been removed.

3) SRM wouldn't know if the arms were removed.

4) Does SRM say that removing the crank arms voids the warranty?

Originally Posted by Doggus View Post
o Non-user serviceable battery
o Non-changeable cranks arms
o Stagnated product

How are people liking the Quarqs?
All the batteries are user-serviceable depending on how bright you are.

It's very likely that all the crank arms are removable since they have to be attached to the SRM spider in some fashion and can therefore be unattached.

At least SRM has a CPU...

Quarqs have had problems but people don't really talk about it.
The_Cretin is offline  
Old 12-07-09, 01:13 PM
  #12  
Grumpy McTrumpy
gmt
 
Grumpy McTrumpy's Avatar
 
Join Date: Sep 2008
Location: Binghamton, NY
Posts: 12,509
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 44 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by The_Cretin View Post

4) Does SRM say that removing the crank arms voids the warranty?


opening the powermeter does. they say this in the manual. is it possible to attach the drive-side crankarm without opening the powermeter?
Grumpy McTrumpy is offline  
Old 12-07-09, 01:49 PM
  #13  
Racer Ex 
Resident Alien
 
Racer Ex's Avatar
 
Join Date: Jul 2007
Location: Location, location.
Posts: 13,083
Mentioned: 154 Post(s)
Tagged: 0 Thread(s)
Quoted: 346 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by The_Cretin View Post

At least SRM has a CPU...

Quarqs have had problems but people don't really talk about it.
Both true. Know of several failures and a bunch of issues getting the Quarq to talk to a head unit. Some of the Quarq "boosters" have been less than forthcoming about problems. It's not a magic bullet, none of them are.

SRM has come out with a new PC unit and several new versions in the last few years so they really haven't been stagnant; very good customer service and turn around, ultra reliable for the most part. Been using them for years now and the only failure I experienced had nothing do do with the PM unit or anything SRM had done, it was an OEM issue.

The US service center slope testing can be off though.

If you were concerned about warranty and wanted the arms swapped just send it back to Colorado. If it's out of warranty WGAF?
Racer Ex is offline  
Old 12-07-09, 01:59 PM
  #14  
The_Cretin
Pedalphile
 
Join Date: Jan 2008
Location: Boulder, CO
Posts: 258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Grumpy McTrumpy View Post
opening the powermeter does. they say this in the manual. is it possible to attach the drive-side crankarm without opening the powermeter?
I believe all the bolt heads are visible without removing the cover so it should be possible.

Also, you can pop the cover off the SRM without them knowing. It's not like they have anti-tamper stuff.
The_Cretin is offline  
Old 12-07-09, 02:08 PM
  #15  
Racer Ex 
Resident Alien
 
Racer Ex's Avatar
 
Join Date: Jul 2007
Location: Location, location.
Posts: 13,083
Mentioned: 154 Post(s)
Tagged: 0 Thread(s)
Quoted: 346 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by The_Cretin View Post
I believe all the bolt heads are visible without removing the cover so it should be possible.

Also, you can pop the cover off the SRM without them knowing. It's not like they have anti-tamper stuff.
If your small ring is tight it'll come off with the ring on occasion. Then you can see the crew of genetically engineered miniaturized Tuetonics running around in there with clip boards recording your data. Pretty cool.
Racer Ex is offline  
Old 12-07-09, 02:50 PM
  #16  
Doggus
half man - half sheep
Thread Starter
 
Doggus's Avatar
 
Join Date: Apr 2005
Location: Allen (Dallas), TX
Posts: 2,453
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Racer Ex View Post
If you were concerned about warranty and wanted the arms swapped just send it back to Colorado. If it's out of warranty WGAF?
I don't currently own one. Looking for a used one. Most likely it will be out of warranty. Not being able to change the crank arms limits the field considerably - unless like you said, I send it in.
Doggus is offline  
Old 12-07-09, 03:00 PM
  #17  
Racer Ex 
Resident Alien
 
Racer Ex's Avatar
 
Join Date: Jul 2007
Location: Location, location.
Posts: 13,083
Mentioned: 154 Post(s)
Tagged: 0 Thread(s)
Quoted: 346 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Doggus View Post
I don't currently own one. Looking for a used one. Most likely it will be out of warranty. Not being able to change the crank arms limits the field considerably - unless like you said, I send it in.
I wouldn't worry about a DIY on it from what I've seen...pretty much an unbolt/rebolt. Bigger issue is finding the other arms if it's a DA unit; that might be hard to find. The Pro/AM proprietary SRM units are a piece of cake to swap arms, you are beholden to Octalink BB's though. Still quite a few around, picked up two Dura Ace for the track bikes.
Racer Ex is offline  
Old 12-07-09, 03:11 PM
  #18  
ridethecliche
Village Idiot
 
Join Date: Jan 2007
Location: Bahstaaaaan
Posts: 20,247
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
You can get DA BB's anywhere I have like 4 stockpiled 105 ones. Should be good till I can afford an SRM of my own.

I'm not sure if I'm allowed to keep mine next year. We'll see. I almost want to give it to a teammate for the season.
ridethecliche is offline  
Old 12-07-09, 03:51 PM
  #19  
El Diablo Rojo
Banned.
 
El Diablo Rojo's Avatar
 
Join Date: May 2006
Location: ATX, Ex So Cal
Posts: 11,058

Bikes: Ridley Noah-Scott Addict-Orbea Ordu

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Doggus there is a guy down here selling a SRAM SRM for 1300 bucks..that's a pretty damn good deal.
El Diablo Rojo is offline  
Old 12-07-09, 04:01 PM
  #20  
Creakyknees
ride lots be safe
 
Creakyknees's Avatar
 
Join Date: Jan 2007
Location: Texas
Posts: 5,223
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Doggus I have a nice PowerTap set I'll sell you.
Creakyknees is offline  
Old 12-07-09, 04:02 PM
  #21  
Doggus
half man - half sheep
Thread Starter
 
Doggus's Avatar
 
Join Date: Apr 2005
Location: Allen (Dallas), TX
Posts: 2,453
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by El Diablo Rojo View Post
Doggus there is a guy down here selling a SRAM SRM for 1300 bucks..that's a pretty damn good deal.
I'm trying to figure out what will work on my Madone (integrated BB nonsense). You referring to the TXBRA post (172.5 cranks)? I really wanted to bite but: a) shorter cranks b) I believe I need an adapter for the SRAM to fit on the Madone. Kind of why I was leaning towards the Shimano version, thinking those would work. I have no clue what will work on this bike.
Doggus is offline  
Old 12-07-09, 04:03 PM
  #22  
Doggus
half man - half sheep
Thread Starter
 
Doggus's Avatar
 
Join Date: Apr 2005
Location: Allen (Dallas), TX
Posts: 2,453
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Creakyknees View Post
Doggus I have a nice PowerTap set I'll sell you.
So, you weren't ready for the truth yet?
Doggus is offline  
Old 12-07-09, 04:47 PM
  #23  
jrennie
Race to train
 
jrennie's Avatar
 
Join Date: May 2005
Location: suffering on the back
Posts: 3,115
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Enduro makes a gxp bottom bracket for the madone bb90

Also, I have the wired sram srm in a 172.5 and it is quite light at 800g

jrennie is offline  
Old 12-07-09, 05:21 PM
  #24  
El Diablo Rojo
Banned.
 
El Diablo Rojo's Avatar
 
Join Date: May 2006
Location: ATX, Ex So Cal
Posts: 11,058

Bikes: Ridley Noah-Scott Addict-Orbea Ordu

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Yep those are the ones...didn't see that you needed 175's..on a slightly off topic note..I'm not down with this BB90/30 nonsense..there are certain things that I feel like are just gimmicks..11s and these new BB fittings to name a few. Change for the sake of change.
El Diablo Rojo is offline  
Old 12-08-09, 03:00 PM
  #25  
Creakyknees
ride lots be safe
 
Creakyknees's Avatar
 
Join Date: Jan 2007
Location: Texas
Posts: 5,223
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Doggus View Post
So, you weren't ready for the truth yet?
tremble before my powah !!!watts up.jpg
Creakyknees is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.