K2 / Proflex Riders Group

General => Tech Forum => Topic started by: eight57 on September 25, 2010, 12:46:30 am

Title: Another new member with 857 expert - different question!
Post by: eight57 on September 25, 2010, 12:46:30 am

Upgrading my drive train.  What front derailleurs will fit my 857 expert series (carbon swing arm)? 

Top/Bottom swing, Top/Bottom Pull, SRAM/Shimano, etc?  Thanks!

Title: Re: Another new member with 857 expert - different question!
Post by: Willie_B on September 25, 2010, 11:40:42 am

http://bikepedia.com/QuickBike/BikeSpecs.aspx?Year=1997&Brand=ProFlex&Model=857&Type=bike

Title: Re: Another new member with 857 expert - different question!
Post by: Lysander on September 27, 2010, 01:25:04 am

Bottom pull top swing low clamp  ;D

Title: Re: Another new member with 857 expert - different question!
Post by: shovelon on September 27, 2010, 08:04:54 am

Quote from: Lysander on September 27, 2010, 01:25:04 am

Bottom pull top swing low clamp  ;D

"Sweet Chariot"  :D :D

Title: Re: Another new member with 857 expert - different question!
Post by: eight57 on September 29, 2010, 12:04:22 am

thanks for the replies!  i've been scouring ebay for a front derailleur to fit the bill -- with little luck.

perhaps it's because i'm looking for an 8-speed FD 31.8mm?  anyone know if this derailleur exists?  if so, what model number? 

Even better, anyone know the model for the XT front derailleur that came stock on the 857??? 

Thanks!

Title: Re: Another new member with 857 expert - different question!
Post by: racerbugg on September 29, 2010, 09:42:54 am

will this work?
http://cgi.ebay.it/ws/eBayISAPI.dll?ViewItem&item=320595028939

Title: Re: Another new member with 857 expert - different question!
Post by: Lysander on September 29, 2010, 09:51:02 am

Naw- mech for x57 frame needs to have top swing and low clamp so that it fits under the swingarm- the x55/x56 can use a regular mech becuase the swinagrm is pivoted behind the bottom bracket.
This type:
http://cgi.ebay.co.uk/Shimano-XT-FD-M770-Front-Derailleur-34-9-Top-Swing-/150470599244?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item2308bf224c

http://cgi.ebay.co.uk/Shimano-XT-FD-M750-Top-Swing-Bicycle-Front-Derailleur-/120627221738?pt=Cycling_Parts_Accessories&hash=item1c15f154ea

I think the mech on the 857 was probably XT M739 series- make sure to check that it's dual or bottom pull as well.
Worth having a look for XT or XTR- I won an XTR M960 a few months ago that was misdescribed as 34.9........was 31.9, would have suited an 857 to a tee- was only £12 or so!!

Title: Re: Another new member with 857 expert - different question!
Post by: Willie_B on September 29, 2010, 01:20:03 pm

http://cgi.ebay.com/Shimano-XTR-FD-m950-Front-Derailleur-XLNT-Cond-/250702055549?pt=Cycling_Parts_Accessories&hash=item3a5f01c87d

Title: Re: Another new member with 857 expert - different question!
Post by: eight57 on September 30, 2010, 09:19:23 pm

thanks - just picked up a NOS XT M-750  31.8mm top swing, bottom pull FD for $22 off ebay.  appreciate all the replies!  on my way to overhauling my 857 as soon as all my parts come in.  she needs some love.

Title: Re: Another new member with 857 expert - different question!
Post by: Lysander on October 01, 2010, 12:23:58 am

Good show!!  ;D

Title: Re: Another new member with 857 expert - different question!
Post by: eight57 on October 12, 2010, 08:15:34 pm

okay -- so i bought a new X7 rear derailleur for my 857, but have a problem with the cable routing.

i routed the rear derailleur through the carbon swingarm no problem.  the problem is that with the "Direct Cable Routing" on the X7 rear derailleur, i almost need a 90 degree turn to make it to the rear derailleur.  has anyone else had this problem or am i missing something REALLY obvious????

thanks in advance.

Title: Re: Another new member with 857 expert - different question!
Post by: Spokes on October 13, 2010, 01:29:05 pm

 ??? Post a photo

Chris