Compact
Double 34/50t Chainrings
$209 137.5mm to 153.5mm
Rings are the same as 2013 SRAM top of the line "Red"
10 speed.
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Apex arms are cold
forged 6000 Series aluminum, with a black finish. After
shortening, I put a brushed aluminum finish on the ends.
These
are "10 speed cranks" meaning the spacing between the
chainring mounting surfaces will give chainring to chainring
offsets compatible with 10 or 11 speed indexed shifting.
If
you have an 8 or 9 speed drivetrain, I'll install an FSA "9
speed kit" which consists of ten 0.2mm (0.008") bronze
spacers placed under the inner ring, for $7. This gives 8/9 speed
spacing with 10 speed rings.
If you have an 11 speed
drivetrain, I can install SRAM 11 speed rings, for an additional
$130. But most people have found that 10 speed rings work fine
with 11 speed drivetrains. Even Di2
Chainrings
are CNC'd from ultra hard 7075-T6 alloy.
One Key Release
crank bolt included.
24mm I.D. drive side bearing, 22mm on
the left.
SRAM had me shorten Apex for their
sponsored triathletes.
110mm
Bolt Circle Diameter (BCD)
Bottom
Bracket;
Apex
are supplied with SRAM/TruVativ GXP English threaded BB
I
can supply BBs and adapters to fit other frame types.
Q
factor;
145mm
Rotor
Q-rings &
Ceramic
BB upgrades
are available at extra cost.
Rotor
Q-rings provide a modest advantage on upright bikes. Especially
for Triathletes
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
check out my
posting on the subject on Bent Rider Online
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Cyclocross 36/46t Chainrings -
Add $40
Mix-N-Match
Chainrings
The
46t chainring is optimized for use with a 36t inner ring and the
50t chainring is optimized for use with a 34t inner ring. But I’ve
sold several with 34/46 & 36/50 and have heard no negative
feedback about shifting. No
charge to swap the 34t for a 36t, but $30 to swap the 50t for a
46t.
If You Don't Want Any Rings
I have
to buy complete cranksets with rings and BBs. Because I sell so
many Apex cranks with Rotor Q-Rings or SRAM 11 speed rings
installed, I have a box full of the unwanted stock rings.
So I can only give a small credit for the stock rings, if you
are paying for a chainring upgrade.
I
have a similar situation with the supplied GXP bottom brackets.
Unless you are upgrading to Ceramic, I can’t give you any credit
for them.
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Turnaround time
Cranks are shortened to order. Because of a
damaged shoulder and arthritic hands I can only shorten 1 set most
days. Cranks are added to the queue in the order payment is
received. When payment arrives I'll let you know where you
stand.
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Ordering,
Payment, Shipping & Contact info
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