A local professional bike fitter would be a great place to start that process.ĭo FSA have any plans to make bikepacking-suitable gears available off the shelf? I have an SL-K crankset but the 46×30 rings are still too highly geared for when you’re carrying a load of camping gear up long steep grades. Is this typically considered when deciding to use shorter arms?įSA: That’s a great question and the simple quick answer would be to adapt the change in crank arm length to the seat height or possibly in addition to an adjustment in cleat stack height, depending on details of the fit. If a rider switches to shorter crank arms, say from 170mm to 150mm, he or she will need to raise their saddle an equal amount, which could mean the bike no longer fits properly. This system is available in a 50/34 combo and is compatible with both 10 and 11 speed drivetrains. With the current range of 11 speed cassettes, I feel that I could do just fine with a double chainring setup and still have the same gear range as our current 10 speed triple chainring setup.įSA: Yes, we now offer an SL-K carbon Tandem crankset with 2x gearing. This means selecting the right gearing and being smart about shifting contribute significant friction savings.īecause our super compact gearing provides a larger difference in CR size you may find it easier to stay away from cross chaining providing friction savings over other gearing options.ĭo FSA make a tandem crankset anymore? I would love to update our tandem from the older Gossamer triple crankset to a lighter weight double crankset. Cross chaining can add up to two Watts of drag. They found only around a 0.5 Watt difference switching between a 53 and 39 tooth chainring size, a 14T difference.Ī more significant contribution to friction is chain angle. While some will want to “power” over a climb or section of road/trail, others may be wanting to clear it within their limits.įriction facts performed some great testing around 6 years ago. With such a large variety of rider types who all have different backgrounds and riding experiences, power efficiency can be different from one rider to another. How much energy transfer loss can be expected in comparison to a known compact like 50/34? By the way, I have your Power Box Super Compact to pair with my road cassette. A big gear is better than the inner small gear, usually. However, in general, a smaller front ring is not the best for power efficiency. This will allow you to choose a much smaller chainring configuration such as Super Compact and still maintain optimum shifting.Ī small front gear is good for gravel riding to get a lower gear ratio with a closer rear cassette. This is an extender designed to fit between the front derailleur and the front derailleur hanger. For the FSA smaller front sprockets and original 52/36 riveted derailleur tabs, what front derailleur combination or extender is going to allow this?įSA: We offer an adapter for this solution. Masters riders and folks who like to climb big hills would appreciate the super compact setup for their road bikes. If anyone has any follow-up questions for FSA about their super compact groups and incredibly short crank arms, pop them in the comments. John McKone and the team from FSA Road fielded, answering every single last one of them.Įverything from front derailleur adapters, crank arm length, tandem cranksets, 1x versus 2x, bikepacking-friendly gearing, MTB options to modular cranksets is covered herein. You guys asked some really interesting, poignant questions on super compact gearing and ultra short cranks. Thank you so much to everyone who submitted questions to FSA for this week’s Ask A Stupid Question. This time we discuss ultra short cranks and super compact gearing for gravel riding with the experts at FSA! Hit the link at the bottom of the post to submit your own question. AASQ is our weekly series where we get to the bottom of your questions – serious or otherwise. But there are some questions you might not want to ask your local shop or riding buddies. We know, there’s no such thing as a stupid question.
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