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Foot and Knee Eccentric Cam Ascenders

I have several eccentric cam foot ascenders that can be used in ropewalking and other systems. Personally, I don't like any of them, preferring to float a Gibbs for ropewalking and not needing a foot ascender when forced to Frog.

I also have some commercial and home-made Mar-Bars. The Mar-Bar was developed specifcally for Inchwork climbing. I rarely inchworm and so I seldom use these.

People have used many different ascenders as knee ascenders in various climbing systems. The two I list here are unique commercial systems. One uses an ascender specifically designed to be a knee ascender. The other has a unique sling design.

Gallery

Foot Ascenders

Image ID Device Description Acquired Weight Height Width Thickness Std. volume Channel Diameter Cam Angle Tooth Pattern
Camp Turbofoot 1984/1985
2108/2109
Camp Turbo Foot L & R, stamped Al shell /w 2 Al rollers, eccentric cam, (133 g. /w harness)
  • Expé-Spelemat, 2014
  • Bob Thrun Collection, 2017
97 66 69 25 112 14.5 36° (3.2)(1H1.2.2.1)^3(2)
Chinese 2339/2336 Chinese L & R, Stamped Al shell, eccentric cam, supplied with foot harness (131 g. /w harness). Suntek, 2017 98 70 66 32 146 14.0 38° (3.4.H.4.2.3.H.2.2.1)(1H1)(4.3)
Climbing Technology Quick Step, Version A 1949/-
2231/2232
Climbing Technology Quick Step, Version A L & R, stamped Al shell, eccentric cam, safety on cam, supplied with foot harness (165 g. /w harness).
  • Knot & Rope Supply on Amazon.com, 2013
  • Bob Thrun Collection, 2017
130 51 73 27 101 15.2 28° (3.4.2)(1H1.2)^3(3.2)
Climbing Technology Quick Step, Version B 2300/1986 Climbing Technology Quick Step, Version B L & R, stamped Al shell, eccentric cam, supplied with foot harness (165 g. /w harness).
  • Expé-Spelemat, 2014
  • Pinnacle Arborist Supplies / Amazon.com, 2017
125 51 73 27 101 15.2 28° (3.4.2)(1H1.2)^3(3.2)
Climbing Technology Quick Tree & QT Universal 2947/2948
& 2949
Climbing Technology Quick Tree & QT Universal
  • QT: Stamped Al shell, eccentric cam, safety on cam, latch mechanism for spurs or QT Universal
  • QT Universal: Foot harness for Quick Tree, stamped SS mounting plate on sewn webbing harness
TreeStuff.com, 2019 235 76 88 35 231 15.2 28° (3.4.2)(1H1.2)^3(3.2)
CMI, Version A 226/-
2231/2232
CMI, Version A L & R, extruded Al shell, eccentric cam, supplied with foot harness
  • On Rope 1, 2007
  • Bob Thrun Collection, 2017
324 56 80 32 143 17.5 24° (4.3)^5(4)
CMI, Version B -/245
2240/2241
CMI, Version B L & R, extruded Al shell, eccentric cam, supplied with foot harness
  • On Rope 1, 2008
  • Bob Thrun Collection, 2017
308 56 80 32 143 17.5 24° (4.3)^5(4)
Edelrid Foot Cruiser 3415/2979 Edelrid Foot Cruiser L & R, stamped Al shell riveted to Al plate, eccentric cam, plastic safety mounted on shell, supplied with foot harness
  • R: CanyonZone.com - Gertjan van Pelt, 2020
  • L: CanyonZone.com - Gertjan van Pelt, 2021
160 62 82 37 185 15.5 32° (3.2.2)(1H1.2)^3(3.2)
Edelrid Foot Cruiser, Safety Removed 3544/3545 Edelrid Foot Cruiser
(Without Safety)
Left, Stamped Al shell riveted to Al plate, eccentric cam, safety removed, supplied with foot harness Karst Sports / Amazon.com, 2022 139 62 82 29 149 15.5 32° (3.2.2)(1H1.2)^3(3.2)
Edelrid Tree Cruiser 3505/3506 Edelrid Tree Cruiser L & R, Stamped Al shell riveted to Al plate, eccentric cam, plastic safety mounted on shell, for Talon stirrup Karst Sports / Amazon, 2022 134 127 80 45 449 15.5 32° (3.2.2)(1H1.2)^3(3.2)
Harken Ninja 3472 Harken Ninja Ambidextrous, Stamped Al shell, dual eccentric cams, supplied with foot harness (wt. includes harness) Rock N Rescue / Amazon, 2021 177 73 80 27 154 14.1 17° (Z)^8
ISC Stryder RP227A1 2301 ISC Stryder RP227A1 Right, Stamped Al shell, eccentric cam, supplied with foot harness (202 g. /w harness). WesSpur Tree Equipment, 2017 130 52 76 28 109 15.2 28° (4.3)^6(4)
ISC Stryder RP228A1 3425 ISC Stryder RP228A1 Left, Stamped Al shell, eccentric cam, supplied with foot harness (211 g. /w harness). ElevatedClimbing / Amazon.com, 2021 136 52 75 30 118 15.5 25° (4.3)^7
Kailas Foot Up 3494/3495 Kailas Foot Up L & R, Milled Al shell, , eccentric cam, supplied with foot harness (123 g. /w harness). Kailas / Amazon.com, 2021 87 58 65 29 109 14.8 35° (3.4)(1S1.2S2)^2(1S1.2.3)
Kong Foot Futura 289/290
2234/2235
Kong Foot Futura L & R, extruded Al shell, eccentric cam, supplied with foot harness (133 g. /w harness)
  • Expé-Spelemat, 2009
  • Bob Thrun Collection, 2017
72 57 79 25 72 13.9 21° (4)(5.2H2)^2(4.2)
Krok, Version A 1595/1596 Krok, Version A L & R, stamped Al shell, eccentric cam, supplied with foot harness (190 g. /w harness). Gear4Rocks, 2012 160 107 77 31 253 15.0 31° (3)(2^3.H)^2(2.2.3.2)
Krok, Version B 1944 Krok, Version B L & R, stamped Al shell, eccentric cam, supplied with foot harness (200 g. /w harness). Gear4Rocks, 2013 160 56 82 31 143 15.4 33° (3)(2^3.H)^2(2.2.3.2)
Krok, Version C 1945 Krok, Version C L & R, stamped Al shell, eccentric cam, Safetty lock, supplied with foot harness (151 g. /w harness). Gear4Rocks, 2013 120 51 61 25 78 15.2 33° (3)(2^3.H)^2(2.2.3.2)
Krok, Sport 3404/3405 Krok Sport
(Спорт)
Stamped Al shell, cast Al cam, supplied with foot harness (149 g. /w harness). Krok, 2021 120 50 63 29 91 17.5 30° (3.2.2)(1H1.2)^3(2.3.2)
Millet 9400 Aphanic´┐Ż-Boulourd 102
2268
Millet 9400 Aphanicé-Boulourd Left, Stamped Al shell with foot platform and eccentric cam, supplied with foot harness.
  • 1990
  • Bob Thrun Collection, 2017
273 157 108 119 2018 15.7 33° (3.4)(H.3)^3(H.2.1)
NewDoar 9400 Aphanic´┐Ż-Boulourd 3456
3457
3493
NewDoar Right, Stamped Al shell, eccentric cam, supplied with foot harness(126 g. /w harness).
  • goplusstore, 2021
  • racan_7030, 2021
  • Meituo / Amazon.com, 2021
83 47 74 25 88 14.6 33° (3.4)(1S1)(2S2)^2(1S1.2S2)^2(3.4.3)
Millet 9400 Foot Ascender 2380
2936
Notch Equipment Jet Step Ambidextrous, Stamped Al shell, dual eccentric cams, supplied with foot harness (wt. includes harness)
  • OMB Group, LLC (ombwarehouse), 2019
  • Nick Bonner, Treestuff.com, 2019
176 73 80 27 154 15.5 17° (Z)^8
Petzl Pantin B02 129
2233
Petzl Pantin B02
Right, stamped Al shell, eccentric cam, supplied with foot harness.
  • On Rope 1, 1999
  • Bob Thrun Collection, 2017
81 48 74 26 92 14.9 33° (3.4)(1S1.2S2)^2(1S1.2.3)
Petzl Pantin B02ALA & B02ARA 276/1501
2060/2061
Petzl Pantin B02ALA & B02ARA L & R, stamped Al shell, eccentric cam, supplied with foot harness (180 g. /w harness).
  • On Rope 1, 2009
  • Bob Thrun Collection, 2017
80 47 73 24 84 14.8 33° (3)(2S2.1S1)^3(2.3)
Petzl Pantin B02BLA & B02BRA 1947/1948
Petzl Pantin B02BLA & B02BRA L & R, stamped Al shell, eccentric cam, supplied with foot harness (80 g. /w harness).
  • On Rope 1, 2013
  • Bob Thrun Collection, 2017
53 45 64 23 66 15.1 36° (3.4)(1S1.1S1.2S2)^2(3.4.3)
Petzl Pantin B02CLA /w B02210 Catch & B02CRA /w B2200 Catch 2318/2319
Petzl Pantin
B02CLA /w B02210 Catch &
B02CRA /w B2200 Catch
L & R, Stamped Al shell, eccentric cam, supplied with foot harness (80 g. /w harness).
Added cam safety kit.
Inner Mountain Outfitters, 2017 53 45 64 23 66 15.1 36° (3.4)(1S1.1S1.2S2)^2(3.4.3)
SOB, Version A (AL-NASR) 1975/1994 SOB, Version A
(AL-NASR)
L & R, Stamped Al shell, eccentric cam, supplied with foot harness (135 g. /w harness).
  • Gold Bucket, 2014
  • Victor Jowison, 2015
90 47 75 25 89 15.8 35° (4)(1S1.2S2.1S1)(4)(1S1)^4(4)
SOB, Version B 3471 SOB, Version B L & R, Stamped Al shell, eccentric cam, supplied with foot harness(137 g. /w harness). Strade eStore / Amazon.com, 2021 81 47 78 25 91 15.0 33° (3.4)(1S1)(2S2)^2(1S1.2S2)(3.4.3)
SUT 2331/2332 SUT L & R, Stamped Al shell /w 2 Al rollers, eccentric cam, supplied with foot harness (116 g. /w harness). Suntek, 2017 84 70 64 24 109 14.0 38° (3.4.H.4.2.3.H.2.2.1)(1H1)(4.3)
TSA Economy, Version A 234
2236
TSA Economy, Version A Left, foot plate and straps attached to RH Kong Modular ascender
  • Bob Thrun, 2007
  • Bob Thrun Collection, 2017
229 120 119 36 508 15.4 30° (3)(2S2.1S1)^3(2.3)
TSA Economy, Version B 2237 TSA Economy, Version B Straps attached to Kong Modular ascender Bob Thrun Collection, 2017 229 120 119 36 508 15.4 30° (3)(2S2.1S1)^3(2.3)

 

Mar-Bar Ascenders

Image ID Device Description Acquired Weight Height Width Thickness Std. volume Channel Diameter Cam Angle Tooth Pattern
Buckingham Mar-Bar, Version A 217 Buckingham Mar-Bar, Version A LH & RH CMI Large Ultrascender mounted on tubular Mar-Bar /w webbing straps Tetyana Zurigat, 2007 1071 193 320 78 4809 17.5 24° (4.3)^5(4)
Buckingham Mar-Bar, Version B 2287 Buckingham Mar-Bar, Version B LH & RH CMI Large Ultrascender mounted on tubular Mar-Bar /w webbing straps Bob Thrun Collection, 2017 1071 193 320 78 4809 17.5 24° (4.3)^5(4)
Buckingham Mar-Bar, Version C 2288 Buckingham Mar-Bar, Version C LH & RH CMI Large Ultrascender bolted back-to-back, mounted on tubular Mar Bar /w webbing straps Bob Thrun Collection, 2017 1018 192 327 77 4828 17.5 24° (4.3)^5(4)
CMI Mar-Bar 2388 CMI Mar-Bar Left CMI Large UltrAscender on steel Mar Bar Michael Young, MWY Enterprises, 2019 871 187 275 80 4130 17.5 24° (4.3)^5(4)
Liebman Jumar Mar-Bar 2307 Liebman Jumar Mar-Bar Gray Jumar on Al plate, BW III rope inside green hose. Bill Liebman, 2017 617 191 304 74 4308 14.0 27° (4.5)^5(4.3)^4
Walsh Mar-Bar 158 Walsh Mar-Bar Wooden Mar-Bar on Gray Jumar Mike Walsh, 2001 451 162 306 74 3697 14.1 27° (4.5)^5(4.3)^4

 

Knee Ascenders

Image ID Device Description Acquired Weight Height Width Thickness Std. volume Channel Diameter Cam Angle Tooth Pattern
HAAS Tree Gear 2911 Climbing Innovations S.A.K.A. Right, stamped frame, oval top hole, bottom slot, reinforced cam, sloping teeth, safety on cam Manuel Ortega, 2019 261
(kit)
104 75 26 201 16.6 27° (3.4.2)((3.2)^3(4.3)
HAAS Tree Gear 2350 HAAS Tree Gear CT Chest Ascender, spliced rope footloop, /w bungie On Rope 1, 2017 344
(kit)
101 74 38 285 15.3 31° (3.4.2)(1H1.2)^3(3.2)

 

Foot Eccentric Cam Ascender Weight Chart