Truvativ IsoFlow MTB cranks
160mm or 95mm to 153mm
Price $79 to $349
 depending on length and chainring options
Prices include: Shortened Arms, Chainrings & All Bolts

Shipping & handling - $11 in the US

Outstate MN residents add 6.875% sales tax. Metro residents add 7.775% sales tax 		Chainring prices are climbing due to the falling dollar. If you want one of the Optional Chainring Upgrades, please contact me to check on current price and availability.

Ordering, Payment, Shipping & Contact info.

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New! 160mm IsoFlows
Until now, 160mm has been the "impossible" size for short triples. You need at least 21mm between old and new holes and I have found no shortenable cranks longer than 175mm.
But I recently discovered that Truvative makes a special 160mm version of the IsoFlows for OEM installation on MTBs for the S.E. Asian market. I was able to "Grey Market" in a couple of cases for those of you who need something just a little shorter.

IsoFlows with steel 22/32/42 MTB rings (153mm shown)
160mm $79 - 153mm $99
95 mm to 152 mm - $104
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.

IsoFlows with steel 28/38/48 "Trekking" rings (140mm shown)
160mm - $85 153mm - $105
95 mm to 152 mm - $110     
To substitute a 26t Shimano ring add $9.  
To substitute a 24t Sugino ring add $15
Optional Chainring Upgrades

With 23-33-44 Rotor "Q" Rings (153mm shown)
160mm $369 - 153mm $389
95 mm to 152 mm; $394

CNC machined in Spain from ultra hard 7075 aluminum. These smooth out the uneven pedaling on recumbents. Expensive, but I'm getting nothing but positive feedback from the dozen sets I've sold.
We've got 8 recumbents and not a round ring on any of them.

With 22-32-44 Race Face Chainrings (145mm Shown)
160mm $179 - 153mm $199
138 mm to 152 mm; $204
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.

With 22-32-44 Race Face "Evolve" Chainrings
160mm $159 - 153mm $179
95 mm to 152 mm; $184
CNC machined from ultra hard 7075 aluminum

With 22-32-44 Shimano steel Chainrings (138mm shown)
160mm $95 - 153mm $115
95 mm to 152 mm - $120
A popular choice for younger riders
With 22-32 Race Face Chainrings and Bashguard (130mm Shown)
24-36-Bashguard Same Price
153mm - $169 95 mm to 152 mm; $174
Middle Ring and Bashguard CNC machined from ultra hard 7075 aluminum.
Inner ring steel
About the TruVativ IsoFlow crankset

These are fairly basic, with a painted finish. 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 the optimum chainline for a road front derailleur and 113mm is best with MTB derailleurs. 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 Shimano UN-54 BB cartridge for $25.

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 IsoFlows 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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