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About the
SRAM S600 crankset
The cranks that followed the SRAM/TriuVativ IsoFlow. Similar forging
but 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. 110mm will give a good chainline for a road bike,
recumbent or older MTB with 130mm spacing. 113mm is best with modern
MTBs or Tandems. If you currently have a107 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. But
if necessary, I can provide a 320 gram Shimano UN-54 BB cartridge for
$29. Or a 210 g. Sinz Expert with 2 bearings on the drive side for $45.
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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.
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S600s w/steel 22/32/42 MTB rings (150mm
PowerSpline shown)
120mm to 153mm S600 $109
95 mm to 119 S600 - $114 160mm IsoFlow - $79
With the small chainrings, these are particularly suited for bikes with
large rear wheels. But about 20% have gone to trikers, with 20" rear
wheels, who are realistic about their gearing needs. |
S600s with steel 28/38/48 "Trekking" rings
(150mm shown)
120mm to 153mm S600 $125
95 mm to 119 S600 - $130 160mm IsoFlow - $95
To substitute a 26t Shimano ring add $9.
To substitute a 24t Truvativ ring add $11
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Optional Chainring Upgrades
(Some ring options are shown on
older Truvative IsoFlow arms which had
a similar shape.) |
TruVativ
Alloy Chainrings 
S600 with 22t steel & 32-44 Alloy
TruVativ Chainrings
(140mm Shown)
120mm to 153mm S600 $172
95mm to 119mm S600 - $177 160mm IsoFlow - $142
For Alloy 22t inner ring, add $12
Alloy rings are high pressure forged from ultra hard 7075
aluminum. |
For serious off-road riders
TruVativ Chainrings & Polycarbonate Bashguard W/22-32 steel rings & 10mm TruVativ Polycarbonate Bashguard.
Lighter & tougher than alloy guards. 120mm -153mm S600 $155
95mm to 119mm S600 - $160 160mm IsoFlow - $125 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
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The Ultimate Setup for Recumbents
23-33-44 Rotor "Q" Rings
(135mm shown)
120mm to 153mm S600 $399
95 mm to 119 S600 - $404 160mm IsoFlow - $369
Expensive? Yes! But I'm
getting nothing but positive feedback from the over 25 sets I've sold.
CNC machined in Spain from ultra hard 7075 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 @ 612-824-2372.
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With 22-32-44 Race Face "Evolve" Chainrings
120mm to 153mm S600 $195
95 mm to 119 S600 - $200 160mm IsoFlow - $165
CNC machined from ultra hard 7075 aluminum (Inner ring steel)
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With 22-32-44 Shimano steel Chainrings (138mm
shown)
120mm to 153mm S600 $125
95 mm to 119 S600 - $130 160mm IsoFlow - $95
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A popular choice for younger
riders 
With 22-32 Race Face Chainrings and Bashguard (140mm Shown)
24-36-Bashguard Same Price
120mm to 153mm S600 - $185
95
mm to 119 mm S600 - $1190 160mm IsoFlow - $155
Middle Ring and Bashguard CNC machined from ultra hard 7075 aluminum.
Inner ring steel
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 With
22-32-44 Race Face Chainrings
(Other sizes available)
120mm to 153mm S600 $212
95 mm to 119 S600 - $217 160mm IsoFlow - $182
CNC machined from ultra hard 7075 aluminum and
hard anodized, with steel ramps on the large ring. Quite possibly the
best round rings on the planet. Black "Team" rings same price. Photo here. |
