SRAM S600 MTB cranks
  85mm to 153mm
Price $109 to $379
depending on length and chainring options
Prices include: Shortened Arms, Chainrings & All Bolts

Outstate MN residents add 6.875% sales tax.
Metro residents add 7.775% sales tax
Prices shown good as of 2/23/2016

Ordering, Payment, Shipping & Contact info.

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About the SRAM S600 crankset

The cranks that followed the SRAM/TriuVativ IsoFlow. Similar shape but cold forged & the hard, tough finish is MUCH better.  Stock chainrings are steel, but are ramped and pinned so shift reliably.  Rings are spaced for 8 or 9 speed chain.

BB spindle; Square taper. 113 mm will give a good chainline for most bikes, 118mm is best for tandems with 140-160mm rear spacing. If you currently have a 110 or 115mm, I recommend giving it a try. If it doesn't work you should be able to pick up the right one at most larger bike shops.

For standard bike parts, it's always best to support your local shops. They should have a 320 gram Shimano UN-55 BB cartridge for about $30.
Or
I can provide 226g. ProMax SC-1  for $39.

S600s are also available to fit a PowerSpline BB, for an added $5

Q factor; 167mm with Shimano 110mm spindle. Great ankle clearance.

Bolt Circle Diameter (BCD) The middle and outer ring are 104mm BCD, inner is 64mm.

"Safely" is a relative term. Modern cranks hopefully have a margin of safety to allow for the occasional 280 lb mountain biker. Shortening will obviously reduce this safety margin, as there will be less aluminum around the pedal hole than before. But the S600s are pretty beefy wherever I put the new pedal hole.

Unless you are a very large or strong rider on a non-recumbent, Knee Savers should be OK with these cranks.

Prices below are for cranks 120mm to 153mm length
Add $5 for lengths 85mm to 119mm as these require spot-facing to provide a flat surface for the pedal.

$109 With 22-32-42 TruVativ Steel Chainrings

S600 w/steel 22/32/42 MTB rings $109 (150mm shown)
Also Available
S650 w/steel 28/38/48 Treking rings $129 
   
S600 With TruVativ Alloy Chainrings
Alloy rings are high pressure forged from ultra hard 7075-T6.
$187 with 22-32-44t Alloy TruVativ Chainrings
$172 with 22t Steel &
32-44t Alloy TruVativ Chainrings
$158 with 22-32t Steel &
44t Alloy TruVativ Chainrings
The outer 44t is 4mm thick to resist bending

Scroll down for more Chainring Options
(Some ring options are shown on older Truvative IsoFlow arms which had a similar shape.)
 
If you want just the arms, no chainrings.
You will save a little on postage. But since over 1/2 of buyers opt for an alloy chainring upgrade, I have boxes of unwanted steel rings. So I can't give you credit for them.
Race Face Narrow-Wide Chainrings
These rings keep the chain from coming off, without retention systems. Review Here.
S600 with 30t Chainring (150mm Shown)
$165 for 30t, $150 for 32 or 34t or
$155 for 36 or 38t

In order to fit a 30t ring on a 104mm Bolt Circle, the female part of the chainring bolt is machined as part of the chainring, adding to material and machining cost.
Available in Black, Blue, Red, Lime Green, Orange & Purple 

30t get black steel chainring bolts. For chrome add $6
Race Face rings are CNC machined from ultra hard 7075 aluminum.
TruVativ Chainrings & Polycarbonate Bashguard

  The 10mm Thick  Polycarbonate Bashguard
is Lighter & tougher than alloy guards.

$155 with 22-32 Steel rings.
Mix-N-Match Ring upgrades
22t Alloy add $15.50 - 24t Steel add $11.00 - 24t Alloy add $17.25
32t Alloy add $25.25 - 36t Steel add $20.25 - 36t Alloy add $26.00
The rings below may not shift optimaly with indexed front shifters.

The Ultimate Setup for Recumbents
23-33-42t Only (44t are no longer made)
Rotor "Q" Rings
(135mm shown)

  $379 (Price reduction)

Expensive? Yes!  But worth it for hills and sore knees.
I'm getting nothing but positive feedback from the over 25 sets I've sold.
CNC machined in Spain from ultra hard 7075-T6 aluminum.


Q-rings provide only a modest benefit on upright bikes.
But on a recumbent the difference is like night and day. 
We've got 7 recumbents and not a round ring on any of them.

On recumbents, Q-Rings smooth out the uneven pedaling and significantly reduce the stress on your knees. And in most cases, riders report more speed for the same effort.

As one gent wrote when ordering a 2nd set for his other 'bent;
"Riding my 2 Catrikes back to back, the round rings feel lumpy and the lumpy rings feel round"

Why they work so differently on 'bents is complicated.  Please phone me for an explanation @ 612-710-9593.

$195 With 22-32-44 Race Face "Evolve" Chainrings
Shown on older IsoFlow arms
CNC machined from ultra hard 7075 aluminum (Inner ring steel)
A popular choice for younger riders
$185 With 22-32 Race Face Chainrings & Bashguard
24-36-Bashguard Same Price

Red, White or Blue Bashguards available at extra cost.
Middle Ring and Bashguard CNC machined from ultra hard 7075 aluminum.
Inner ring steel
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