SRAM E-Paper No.54 Date: 2017/9

SRAM E-Paper No.54 Date: 2017/9 Content: I. SRAM news/announcement Lost Found II. Product information Quarq DFour91 Quarq DZero for Specialized III.Installation & maintenance ZIPP Cognition Rear Hub Service 1

I. SRAM news/announcement Lost Found Emily Kachorek, the Sacramento-based pro cyclocross racer and co-owner of Squid Bikes, brings us the following account of her experience with her team at the Lost and Found gravel grinder in Portola, California. All photos are courtesy of Angel Perez unless otherwise noted. Lost and Found isn t your typical gravel grinder, it's a gravel grinder done Sierra Buttes Trail Stewardship style. Following the wettest and snowiest winter on record, this year's event was far from the fast-rolling, graded farm roads that many people expect from a gravel race. Drafting was not much of an option rain ruts, loose rocks and sandy turns forced you to keep your head up and wits about you. Technical climbs rode more like single track than fire road, and high elevation views of June snow-capped peaks pleaded with you to stop and enjoy the moment. I would imagine that a few of this year's 1,000 participants may have wondered if the name "Lost and Found" was just a bad joke at some point during their two- (or nine-) hour journey. If you are familiar with California s famed Downieville trail system and mountain bike race, you are probably familiar with the Sierra Buttes Trail Stewardship. They are responsible for restoring, maintaining, and building all the wonderful trails in the greater Downieville and Lakes Basin area. This year's Lost and Found, now in its fourth year, required a completely new route thanks to Mother Nature's wild winter. The new route covered 93 miles (150 km) and 6,500 feet (1980 meters) of elevation gain which was almost equally divided between four climbs and was comprised of 65% dirt. 2

Additionally, there were two shorter, 57-mile (92 km), and 25-mile (40 km) options to make sure everyone had a challenging and fun outing. Photo credit: Sierra Buttes Trail Stewardship Having been to the past three years of the event, I was excited to bring the entire Squid Squad out to Lake Davis. Wednesday afternoon our Pro Squad arrived, Anthony Clark from Western Massachusetts and Sammi Runnels from Austin, Texas. We built bikes, went for an evening river shred, and discussed and organized the supplies for Friday evening's Race Day Rattlecan. By Thursday morning we had the Squid Van loaded with four days of camping, bike racing, and painting supplies. We secured a lovely spot right on Lake Davis and explored the singletrack that loops around the lake until the sun disappeared over the nearby 8,000-foot peaks. 3

The Stewardship knows how to create a rugged and beautiful off-road adventure, but they also throw a bike party that is seamlessly rolled in with leg and lung busting efforts. Festivities started Friday afternoon on the shores on Lake Davis with an expo area, beer tent, snacks, and packet pick-up. Last year we painted my Dreamsicle-themed bike for our first iteration of our Race Day Rattlecan, and this year our plan was to paint a bike for Sammi. One of our friends said it perfectly: A Race Day Rattlecan Is the Iron Chef of bike racing. A little desperation. A little creativity. Event participants and their families get to see the whole process of spray painting a bike, ask questions, and even try their hand with Spray.Bike spray paint. We decided to keep this year's paint job "fast and dirty" and incorporated a piece of found trash as the masking we used for creating a polka dot pattern. We left the frame with a nice matte finish and master mechanic and Squid co-owner, Chris Namba, built the bike that night back at the campsite under a Coleman lantern. By 10pm the bike was built. Sammi took it for a test ride around the campground and we were ready for the following day's adventure. 4

The race started with a few miles of paved road but then quickly started up a well-graded dirt climb. Anthony took off with the lead men's group and Sammi and I worked in with the solid group of pro women that included multiple National Champions and Olympians. Like almost everyone, flats slowed us all down, knocking Anthony of out the lead group back to 8th and me back to 5th. After a few flats, Sammi opted for the party pace, showing off her new bike, and stopping to enjoy the views. After we cleaned dirt out of, well, everything, we meet up to enjoy the sunset over the lake, recount the day's high points, misadventures, and to wash down some of that Sierra Nevada dirt with beer, tacos, and campfire s'mores. It seems that with every hour I spend in the Lost Sierra I fall more in love with its beauty and the people who are drawn to it. 5

Product information Quarq DFour91 The DFour chassis pairs with Shimano s 11-speed Dura-Ace 9000, Ultegra 6800 and 105 5800 chainrings. New DFour91 is designed for Shimano s Dura-Ace R9100 chainrings. Both use Quarq s lightweight, sturdy Exogram carbon crank arms. GXP and BB30 versions work with every bottom bracket shell, including BBright and BB386EVO. If you already have a power meter with an 8-bolt interface, upgrade using the DFour or DFour91 power meter spider. THINGS TO REMEMBER- DFour91 is designed for Dura-Ace R9100 chainrings. Must be paired with a compatible SRAM bottom bracket. 8-bolt power meter owners can upgrade using a power meter spider. Bluetooth low energy technology and ANT+ wireless data transfer AxCad -- no cadence magnet required 10K Temperature Compensation Battery -- CR2032, 200-hour battery life, change without tools Power Balance. OmniCal -- swap chainrings without affecting accuracy IPX7 waterproof rating Accuracy -- within 1.5%, measuring both legs. R8000 chainrings have not been tested yet. 6

SPECIFICATIONS Crank arm length BB Compatibility Bolt Circle Diameter (BCD) Chainline BB Spindle Interface Crank arm material Color (Crank arm) DFOUR91 162.5mm, 165mm, 170mm, 172.5mm, 175mm, 177.5mm BB30/PF30-68mm, GXP/PF GXP 68mm 4 Arm 110 BCD 45.0mm 24mm, 30mm Carbon Black Quarq DZero For Specialized Quarq has introduced a DZero spider designed to replace the factory spider on Specialized s S-Works carbon crankset. Quarq DZero for Specialized embodies 10 years of Quarq advances in power meter technology, plus new features such as dual Bluetooth low energy and ANT+ wireless data transfer, revised circuitry, a new strain gauge design and the Qalvin BLE app. 7

THINGS TO REMEMBER- Bluetooth low energy technology and ANT+ wireless data transfer. AxCad no cadence magnet required. 10K Temperature Compensation. Battery CR2032, 200-hour battery life, change without tools. Power Balance. OmniCal swap chainrings without affecting accuracy. IPX7 waterproof rating. Accuracy within 1.5%, measuring both legs. Free firmware upgrades with the Qalvin app. A Specialized crank lock ring tool is required for installation. Traditional 5-arm spider compatible with Specialized S- Works Carbon 2013-2017 Road Crank Arms. 8

COMPATIBLE 2013-2017 Thick Crank Arm 9

NOT COMPATIBLE 2012 or Earlier Thin Crank Arm 10

III.Installation& maintenance ZIPP Cognition Rear Hub maintain Video Link:Service for the rear Zipp Cognition hub https://www.youtube.com/watch?v=99mbjnqjqps Rear Hub Service The hub can be serviced while in the wheel. However, if your spokes or rim are damaged, you can remove the hub from the wheel which will make servicing your hub easier. To remove the hub, use a spoke wrench to de-tension the spokes, then use a pair of metal snips to cut the spokes, remove the hub from the wheel, and remove the spoke ends from the hub. Tools and Supplies Needed for Service Safety glasses Nitrile gloves Clean, lint-free rags Grease brush Pick Bench vise Park Tool AV-4 or AV-5 Axle and Spindle Vise Inserts Vise soft jaws (aluminum) Plastic mallet Zipp CognitionTM Grease Zipp Cognition Oil and small oil syringe Isopropyl alcohol Blind Hole Bearing Puller Set 17 mm slotted attachment 20 mm slotted attachment Bearing Press Tools Zipp 6804 Bearing Press Tool SRAM 6903 Bearing Press Tool Replacement Parts Zipp Cognition 61804 hub bearing (drive side) Zipp Cognition 61903 hub bearing (non-drive side) Zipp Cognition driver body (optional) Cognition clutch assembly (optional) Cognition driver body seal For part numbers, please refer to the Zipp Spare Parts Catalog in the Support section of www.zipp.com 11

SAFETY INSTRUCTIONS Always wear nitrile gloves when working with bicycle lubricants. Rear Hub End Cap and Driver Body Removal Notice: To prevent damage to the hub surfaces, do not use Acetone or similar products to clean parts. Step:1 Insert the Park Tool AV-4 or AV-5 Axle and Spindle Vise Insert tool into a vise. Clamp the small diameter of the drive side end cap into the smallest slot in the vise insert tool and pull up on the wheel/hub to remove the end cap. Repeat on the non-drive side to remove the other end cap. 12

Step2: Use your fingers to remove the driver body assembly from the hub and axle. Use your fingers to remove the driver body seal. Use your fingers to remove the driver body seal from the clutch seal cap if necessary. The procedure for driver body removal and installation is the same for each type of driver body (SRAM 10/11 SPD, SRAM XDTM, and Campagnolo ). The SRAM 10/11 SPD driver body is pictured. Rear Hub Axle and Bearing Removal Notice: Bearing removal causes permanent damage to the bearings. Do not reinstall the bearings. Step1: Use a plastic mallet to gently tap the axle on the non-drive side of the hub to remove the axle from the hub shell. Pull the axle and drive side bearing out of the drive side of the hub. If the drive side bearing was not removed with the axle, it must be removed with the Blind Hole Bearing Puller tool. Skip to step 3. 13

Step2: Place the axle in between flat aluminum vise soft jaws, drive side down, with the bearing resting on top of the soft jaws. Make sure the axle bearing step does not contact the soft jaws. Using a plastic mallet, gently tap on the top of the non-drive end of the axle until it is dislodged from the bearing. Discard the bearing. Spray isopropyl alcohol onto the axle and clean the axle with a rag. Notice: To avoid damage to the axle, do not allow the axle to contact the vise soft jaws. If the axle bearing step is damaged, the axle must be replaced. Step3: If the drive side bearing was not removed with the axle, remove the drive side bearing from hub shell with a Blind Hole Bearing Puller tool. Insert the 20 mm slotted bearing puller attachment through the drive side bearing. Align the slotted attachment with the bottom of the bearing, then tighten the slotted attachment to expand the puller inside the bearing. 14

Notice: Do not overtighten the slotted attachment. For more detailed assembly and usage information, consult your bearing puller manufacturer's instructions. Step4: Thread the shaft of the bearing puller into the slotted attachment. While holding the wheel securely, forcefully pull back on the slide hammer to remove the bearing from the drive side of the hub shell. Remove the bearing from the slotted attachment. Discard the bearing. Step5: Insert the 17 mm slotted bearing puller attachment through the non-drive side bearing. Align the slotted attachment with the bottom of the bearing, then tighten the slotted attachment to expand the puller inside the bearing. Notice: Do not overtighten the slotted attachment. For more detailed assembly and usage information, consult your bearing puller manufacturer's instructions. 15

Step6: Thread the shaft of the bearing puller into the slotted attachment. While holding the wheel securely, forcefully pull back on the slide hammer to remove the bearing from the non-drive side of the hub shell. Remove the bearing from the slotted attachment and discard the bearing. Step7: Spray isopropyl alcohol in the rear hub bearing bores and clean the hub with a rag. Rear Hub Bearing Installation Notice:Use only Zipp CognitionTM replacement bearings in Zipp Cognition hubs. Step1: Place the drive side end of the axle on a flat surface. Install a new 61804 Zipp Cognition drive side bearing onto the non-drive side of the axle, black seal side first. Slide the bearing to the drive side of the axle, to the bearing step until it stops. Step2: Slide the Zipp 6804 bearing press tool over the non-drive side of the axle and rest it flat on the bearing. Use a plastic mallet to gently tap the Zipp bearing press tool until the bearing is seated onto the axle. Stop when the bearing is flush against the axle bearing step. 16

Step3: Place the wheel on flat surface, non-drive side up. Insert a new 61903 Zipp Cognition bearing into the non-drive side of the hub shell, with the black seal facing outward. Step4: Place the SRAM 6903 (30 mm x 17 mm) bearing press tool on top of the bearing. Use a plastic mallet and gently tap the bearing press tool until the bearing is pressed into the hub shell. Stop when the bearing stops inside the hub bearing bore. 17

Step5: Insert the non-drive side of the axle into the drive side of the hub, through the non-drive side bearing. Position the drive side bearing into the drive side hub bearing bore. Step6: Place the SRAM 6903 (30 mm x 17 mm) bearing press tool on a flat table. Position the non-drive side of the hub on the bearing press tool. Insert the Zipp 6804 bearing press tool, grooved end first, onto the drive side axle. Notice : The grooved end of the Zipp 6804 bearing press tool has an internally tapered interface that fits over the driver axle bearing step to prevent damage to the axle. Step7: Gently tap the 6804 Zipp bearing press tool with a plastic mallet until the drive side bearing is seated into the hub shell. Stop when the drive side bearing stops inside the hub bearing bore. 18

Rear Hub Clutch Removal Step1: Use a pick to gently pry the clutch seal cap from the hub shell. Use your fingers to remove the clutch seal cap. Use your fingers to remove the o-ring. Spray isopropyl alcohol onto the clutch seal cap and o-ring and wipe them with a rag. Install the o-ring back onto the clutch seal cap. Step2: Use a pick to lift one side of the clutch assembly from the hub shell. Use your fingers to remove the clutch assembly from the hub shell. Spray the clutch assembly with isopropyl alcohol to remove the clutch oil, and 19

place the clutch assembly on a rag to dry. Notice: Do not disassemble the clutch assembly. If the clutch assembly is damaged, it will need to be replaced. Consult the ZIPP Spare Parts Catalog at www.zipp.com/support/manuals for part number information. Do not allow the magnets on the bottom of the clutch assembly to contact any of the opposing magnets seated inside the hub shell. Do not remove the magnets seated in the hub shell. In the event a magnet assembly is removed from the hub, re-install the magnet into the hub shell. Rear Hub Clutch Installation Step1: Align the three magnets on the bottom of the clutch assembly with the empty circular magnet bores in the hub shell. Align the clutch teeth with the hub teeth, and install the clutch assembly into the drive side of the hub shell. Notice: Do not allow any of the magnets on the bottom of the clutch assembly to contact any of the opposing magnets seated inside the hub shell. Do not remove the magnets seated in the hub shell. 20

Step2: Use a small syringe to apply approximately 0.5 ml of Zipp Cognition clutch oil onto the clutch assembly. Do not apply grease to the new clutch assembly. Step3: Install the clutch seal cap and press it into the hub shell with your thumbs. Driver Body Service Zipp recommends replacing the entire driver body if the bearings are worn or any part is damaged. For part numbers, please refer to the Zipp Spare Parts Catalog in the Support section of www.zipp.com. Driver Body Installation Step1: Use your fingers to install a new driver body seal onto the driver body. 21

Step2: Apply Zipp CognitionTM grease to the drive side of the rear axle. Wipe away any excess grease with a rag. Notice: Do not apply grease to the clutch or bearing. Step3: Slide the driver body assembly, onto the drive side axle. Align the driver body teeth with the clutch teeth, and press the driver body into the hub shell until it is seated. The procedure for driver body removal and installation is the same for each type of driver body (SRAM 10/11 SPD, SRAM XDTM, and Campagnolo ). The SRAM 10/11 Speed driver body is pictured. Rear Hub End Cap Installation Step1: Apply Zipp CognitionTM grease to the non-drive side axle and bearing. Wipe away any excess grease with a rag. 22

Step2: Spray isopropyl alcohol on a rag and clean the end caps. Apply Zipp Cognition grease to the inside of each end cap. Remove any grease from the outside surface of the end caps before installation. Grease is applied to prevent moisture from entering the hub assembly. Notice: Ensure the o-ring is in the groove on the internal surface of the end cap before installing the end caps. Improperly installed seals may result in hub drag. Step3: Install the end caps by pressing them onto the axle by hand until they snap securely into place. Wipe away any excess grease from the hub and end cap. -END- 23