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4-BOLT DECIMAL CHAIN RINGS
Rennen Decimal Gearing is a breakthrough in gearing technol-
ogy. We have developed Special Engineered Tooth profiles that
allow us to manipulate the size of a existing gearing to make it
slightly harder or easier depending on your needs for the track.
Changing your gearing by Fractions of a tooth is now possible.
Size Decimal .1
Decimal .2
Decimal .7
Decimal .8
Decimal .9
39
91-5145 391 91-5145 392 91-5145 397 91-5145 398 91-5145 399
40
91-5145 401 91-5145 402 91-5145 407 91-5145 408 91-5145 409
41
91-5145 411 91-5145 412 91-5145 417 91-5145 418 91-5145 419
42
91-5145 421 91-5145 422 91-5145 427 91-5145 428 91-5145 429
43
91-5145 431 91-5145 432 91-5145 437 91-5145 438 91-5145 439
44
91-5145 441 91-5145 442 91-5145 447 91-5145 448 91-5145 449
4-BOLT CHAINRING
Black
White
List
91-5175 36 91-5176 36 $39.95
91-5175 37 91-5176 37 39.95
91-5175 38 91-5176 38 39.95
91-5175 39 91-5176 39 39.95
91-5176 40 39.95
91-5175 41 91-5176 41 39.95
91-5175 42 91-5176 42 39.95
91-5175 43 91-5176 43 39.95
91-5175 44 91-5176 44 39.95
91-5175 45 91-5176 45 39.95
• CNC machined aluminum
• 5.5mm thick for strength and stiffness
• Works with 1/8” and 3/32” chains
• 4 bolt, 104mm BCD
WPS# List
91-518 $39.95
• For use with 3-Piece Race Chromoly Cranksets
and 19mm (.75") BB spindles
• 104bcd 4-bolt
• Made in the USA from CNC machined aluminum
SPIDER
SPEEDLINE 4-BOLT SPIDER
Color
WPS# List
Black
91-519K $59.95
White
91-519W 59.95
Red
91-519R 59.95
Blue
91-519B 59.95
Gold
91-519G 59.95
• For use with 48 spline x 19mm BB Spindles
• 104 bcd 4-Bolt
• Spline Drive Design for more precision and strength
CHAIN RINGS & PARTS
RACEWEAR
GLOVES
FOOTWEAR
HELMETS
HELMETACC.
EYEWEAR
PROTECTIVE
WEAR
CASUALWEAR
GEARBAGS
HYDRATION
ACCESSORIES
FRAMES&BIKES
FORKS
HEADSETS
STEMS
HANDLEBARS
GRIPS
SHIFTING
BRAKING
LIGHTING
TIRES&TUBES
WHEELS&RIMS
HUBS/CHAINS&
PARTS
CHAINRINGS&
PARTS
PEDALS
CRANKSETS
BOTTOM
BRACKETS
SEATS/POSTS&
CLAMPS
PLATES&
NUMBERS
SECURITY
CHEMICALS
TOOLS
PROMOTIONAL
INDEX
Phone: 1-800-999-3388 / 1-877-359-2946