More About Ascender Handles

 

The U.I.A.A. once set a standard defining a minimum acceptable size for an ascender's handle. The standard included a minimum hand opening size defined by the area obtained by drawing a 20 mm. radius top circle and a 15 mm. radius bottom circle whose centers are 60 mm. apart, and then connecting the circles with the common tangents as shown in the figure. I prefer to think in terms of the overall length of the opening and the diameters of the circles, so I'll refer to this as the 95-40-30 shape.

I can't take this standard very seriously, for some of the following rather obvious reasons:

Nevertheless, I thought it might be amusing to define a few other shapes and compare the various ascenders. I made six different "handle size gages" out of wood, and used them to test the opening for each handled ascender in my collection. All of these were designed by connecting the tangents of two circles in the same manner as the U.I.A.A. defined their handle standard. In addition to the U.I.A.A. gage, I made the following gages:

 Code  Size What fits
 60-20-20 Tiny Two or three of my fingertips
 80-30-30 Small Three of my fingers, fully inserted
 100-30-30 Ample Four of my fingers, fully inserted to palm
 110-35-30 Large Four of my fingers, wearing leather gloves, fully inserted
 120-50-40 Huge! Four of my fingers, wearing expedition mittens, not badly compressed.

Needless to say, these sizes are completely arbitrary, and I don't believe that I can justify this as being a very good set. "near misses." Second, since none of the ascenders accommodated the 120-50-40 gage, it was clearly too large to be meaningful. In 2015 I made four more gages with intermediate sizes, but one of these, the 115-40-35, was still too large for any of my ascenders to accommodate it. Some of the gages are tapered (the circle at one end is larger than the other), and these columns in the table are shaded.

Now for the results. A green dot indicates a fit with no problems, while half a dot indicates a fit on only one side of a dual-handled ascender. A yellow dot Odd fit indicates that the gage only fit in an unusual way, such as in a particular ascender configuration not normally used for ascending (e.g., if the cam safety was not in the locked position). A green dot with an orange bar Odd fit indicates that the gage barely fit, wihile gray dot Odd fit indicates that the gage barely missed fitting. I used the No fit symbol to emphasize a no-fit situation that some people might find surprising, just to show that I didn't omit a green dot by accident.

Picture ID Device U.I.A.A.
90-40-30
60-20-20 70-25-25 80-30-30 90-30-30 100-30-30 105-35-30 110-35-35 115-40-35 120-50-40


Handled Eccentric Cam Ascenders

Advanced Base Camp 211
2205
Advanced Base Camp Fits Fits Fits Fits Fits Fits Fits      
Altius, Version A 2308 Alpidex Move Up Fits Fits Fits Fits Fits Fits Fits      
Altius, Version A 123 Altius, Version A Fits Fits Fits Fits No fit        
Altius, Version B 257 Altius, Version B Fits Fits Fits Fits Fits Fits        
Anthron AD-10 & AL-15 194/195 Anthron AD-10 & AL-15 Fits Fits Fits Fits Fits Fits Fits No fit    
Anthron VauDe AD-10 & AL-15, Version A 133/134
2109/2191
Anthron VauDe AD-10 & AL-15, Version A Fits Fits Fits Fits Fits Fits Fits Fits    
Anthron VauDe AD-10 & AL-15, Version B 155/156 Anthron VauDe AD-10 & AL-15, Version B Fits Fits Fits Fits Fits Fits Fits No fit    
Anthron VauDe AD-10 & AL-15, Version B 2164 Апыурс, Version A   Fits Fits Fits Fits Barely misses        
Anthron VauDe AD-10 & AL-15, Version B 2165 Апыурс, Version B   Fits Fits Fits Fits Barely misses        
Anthron VauDe AD-10 & AL-15, Version B 2323 Asol   Fits Fits Fits Fits Fits        
Beal Hands Up 2052 Beal Hands Up Fits Fits Fits Fits Fits Barely misses        
Black Diamond Index 1995
1996
Black Diamond Index Fits Fits Fits Fits Fits Fits        
Black Diamond Index 2325 Blanzo Fits Fits Fits Fits Fits Fits Fits      
Brasovia 1589 Brasovia Fits Fits Fits Fits Fits Fits Barely misses      
Camp Pilot 151
2206
Camp Pilot Fits Fits Fits Fits Fits Fits Fits      
Clark Single-handled Dual Ascender 1531 Clark Single-handled Dual Ascender   Fits Fits Fits Fits Fits        
Climb Tech 1932/1972
2197
Climb Tech Fits Fits Fits Fits Fits Fits Barely misses      
Climbing Technology (Knot & Rope) 1950/1951 Climbing Technology Amelia
(Knot & Rope)
Fits Fits Fits Fits Fits Fits Fits      
Climbing Technology Quick'Arbor 1976
2289
Climbing Technology Quick'Arbor Fits Fits Fits Fits Fits Fits Fits Barely misses    
Climbing Technology Quick'Arbor (separated) 1990 Climbing Technology Quick'Arbor (separated) Fits Fits Fits Fits Fits Fits Fits Barely misses    
Climbing Technology Quick'Up, Version A 2008
2011
Climbing Technology Quick'Up, Version A Fits Fits Fits Fits Fits Fits Fits      
Climbing Technology Quick'Up, Version B 2012 Climbing Technology Quick'Up, Version B Fits Fits Fits Fits Fits Fits (blocked by
finger ledge)
     
Climb X X Ascender 1997 Climb X X Ascender Fits Fits Fits Fits Fits Fits Odd fit      
Clog Expedition, Version B 2159 Clog Expedition, Version A   Fits Fits No fit            
Clog Expedition, Version B 24
1910
2158
Clog Expedition, Version B   Fits Fits No fit            
Clog Expedition, Version B 2156 Clog Expedition, Version C   Fits Fits Fits Barely misses          
Clog Expedition, Version B 25
2157
Clog Expedition, Version D   Fits Fits Fits Barely misses          
Clog Expedition, Versions C1 & C2 1505
1567
Clog Expedition, Version E   Fits Fits Fits Fits          
Clog Expedition, Version D 1505 Clog Expedition, Version F   Fits Fits Fits Barely misses          
Clog Expedition, Version E 171
1555
2007
Clog Expedition, Version G   Fits Fits Fits Barely misses          
Clog Expedition, Version F 218
2166
Clog Expedition, Version H   Fits Fits Fits Barely misses          
Clog Expedition, Version G 26
172
2167
Clog Expedition, Version I   Fits Fits Fits Barely misses          
CMI Expedition 130
2226
CMI Expedition Fits Fits Fits Fits Fits Fits Fits      
CMI Expedition, Dual Handle 239
2227
CMI Expedition, Dual Handle Fits Fits Fits Fits Fits Fits Fits      
CMI Expedition Twin, Version B 1934
1940
2279
CMI Expedition Twin Fits Fits Fits Fits Fits Fits Fits      
CMI 5000, Version A 2221 CMI 5000, Version A   Fits Fits Fits Fits          
CMI 5000, Version B 2225 CMI 5000, Version B   Fits Fits Fits Fits          
CMI 5000, Version C 2222 CMI 5000, Version C   Fits Fits Fits Fits          
CMI 5000, Version D 2299 CMI 5000, Version D   Fits Fits Fits Fits          
CMI 5000, Version A 27 CMI 5000, Version E   Fits Fits Fits Fits          
CMI 5000, Version F 2220 CMI 5000, Version F   Fits Fits Fits Fits          
CMI 5000, Version B 292
2219
CMI 5000, Version G
(a.k.a. 5001)
  Fits Fits Fits Fits          
CMI 5002 28
170
1545
2224
CMI 5002   Fits Fits Fits Fits          
CMI 5003 29 CMI 5003   Fits Fits Fits Fits          
CMI 5004 30
2223
CMI 5004   Fits  Fits Fits Fits          
CMI Large UltrAscender, Version A 31
2229
CMI Large UltrAscender, Version A   Fits Fits No fit            
CMI Large UltrAscender, Version B 114 CMI Large UltrAscender, Version B   Fits Fits No fit            
CMI Large UltrAscender, Version C 216
2230
CMI Large UltrAscender, Version C   Fits Fits No fit            
CMI Large UltrAscender, Version D 246 CMI Large UltrAscender, Version D   Fits Fits No fit            
CMI Large UltrAscender, Version D (Modified) 115/116 CMI Large UltrAscender, Version D (Modified)   Fits Fits Fits            
CMI Small UltrAscender, Version A 32 CMI Small UltrAscender, Version A   Fits                
CMI Small UltrAscender, Version B 33 CMI Small UltrAscender, Version B   Fits                
CMI Small UltrAscender, Version C 1518
2228
CMI Small UltrAscender, Version C   Fits                
CMI Small UltrAscender, Version D 229 CMI Small UltrAscender, Version D   Fits                
CMI Small UltrAscender, Version D (Modified) 34/35 CMI Small UltrAscender, Version D (Modified)   Fits                
Edelrid Elevator 220 Edelrid Elevator Fits Fits Fits Fits Fits Fits Fits      
Fixe Capitan 258 Fixe Capitan Fits Fits Fits Fits Fits Fits Barely misses      
Good Makings 2322 GM Climbing Fits Fits Fits Fits Fits Fits Barely misses      
Good Makings 1973 Good Makings Fits Fits Fits Fits Fits Fits Barely misses      
GrandWall 1998
2193
GrandWall Fits Fits Fits Fits Fits Fits Barely misses      
Grivel 1981/1982
2087/2088
Grivel A&D, Version A Fits Fits Fits Fits Fits Fits Barely misses      
Grivel A&D, Version B 2337/1982
2087/2088
Grivel A&D, Version B Fits Fits Fits Fits Fits          
Grivel 2327 Grivel A1 Fits Fits Fits Fits Fits          
heightec-PMI Pulsar D40, Version A 256
2093
heightec-PMI Pulsar D40, Version A Odd fit
(but only
upside-down!)
Fits Fits Fits Fits Fits No fit      
heightec-PMI Pulsar D40, Version B 1500
2094
2212
heightec-PMI Pulsar D40, Version B Odd fit
(but only
upside-down!)
Fits Fits Fits Fits Fits Odd fit
(but only
upside-down!)
     
Hugh Banner, Version A 1541 Hugh Banner, Version A Fits Fits Fits Fits Fits Fits        
Hugh Banner, Version B 199 Hugh Banner, Version B Fits Fits Fits Fits Fits Fits        
International Safety Components, Version A 145
2211
International Safety Components, Version A Fits Fits Fits Fits  Fits Fits No fit      
International Safety Components, Version B 157 International Safety Components, Version B Fits Fits Fits Fits Fits Fits Fits      
International Safety Components RP240 2024
2209
International Safety Components RP240 Fits Fits Fits Fits Fits Fits Fits      
1551 Jumar, Version A   Fits No fit No fit            
1576
2172
Jumar, Version B   Fits Fits Fits            
Jumar, Version A 136 Jumar, Version C   Fits Fits Fits            
Jumar, Version B 236
1506
1549
1550
2001
Jumar, Version D   Fits Fits Fits            
Jumar, Version C 36
37
272
Jumar, Version E   Fits Fits Fits            
Jumar, Version D 38
293
1547
1911
2171
2173
2174
Jumar, Version F   Fits Fits Fits            
Jumar, Version E 1535 Jumar, Version G   Fits Fits Fits            
Jumar, Version F 118 Jumar, Version H   Fits Fits No fit            
Jumar 79, Version A 39
297
2067
Jumar 78, Version A   Fits Fits Fits Fits          
Jumar 79, Version B 40 Jumar 78, Version B   Fits Fits Fits Fits          
Jumar 79, Version C 41 Jumar 78, Version C   Fits Fits Fits Fits          
Jumar 78, Version D 265
270
285
1532
1905
Jumar 78, Version D   Fits Fits Fits Fits          
Jumar 78, Version E 42
1908
Jumar 78, Version E   Fits Fits Fits Fits          
Jumar, Fritschi 271
2175
2278
Jumar, Fritschi   Fits Fits Fits Fits          
Jumar, Swiss Rescue 1967
2177
Jumar, Swiss Rescue   Fits Fits Fits Fits Odd fit        
Jumar Tree 1968
2285
Jumar Tree   Fits Fits Odd fit            
Jumar, WAG 273
2176
Jumar, WAG   Fits Fits Fits Fits          
Kirov 187 Kirov Fits Fits  Fits Fits Fits Fits        
Kong-Bonaiti, Version A 223 Kong-Bonaiti, Version A Fits Fits Fits Fits Fits Fits        
Kong-Bonaiti, Version B 139
2199
2202
Kong-Bonaiti Lift Fits Fits Fits Fits Fits Fits        
Kong-Bonaiti Modular With Caver Handle 22
1566
1579
Kong-Bonaiti Modular With Caver Handle   Fits Fits Fits Fits          
Kong-Bonaiti Modular With Climber Handle 23
230
269
Kong-Bonaiti Modular With Climber Handle   Fits Fits              
Kong-Bonaiti Modular With Dual Handle 23 Kong-Bonaiti Modular With Dual Handle   Fits Fits One side            
Kong-Bonaiti double rope 1516 Kong-Bonaiti double rope Fits Fits Fits Fits Fits          
Kong Hand Futura (large grip) 1552
2103
Kong Futura (Large Grip)   Fits                
Kong Hand Futura (small grip) 299 Kong Futura (Small Grip)   No fit                
Kong Lift, Version A 2200 Kong Lift, Version A Fits Fits Fits Fits Fits Fits Fits      
Kong Lift 2016/2017 Kong Lift Fits Fits Fits Fits Fits Fits Fits      
Kong Procave 249
2201
Kong Procave   Fits Fits Fits Fits          
Kong Trender 1523
2291
Kong Trender Fits Fits Fits Fits Fits One side        
Kong Twin, Version A 210
2290
Kong Twin, Version A One side Fits Fits One side One side          
Kong Twin, Version B 1529
2292
Kong Twin, Version B One side Fits Fits One side One side          
Krok, Version A 1533 Krok, Version A Fits Fits Fits Fits Fits Fits Fits      
Krok, Version B 1565 Krok, Version B Fits Fits Fits Fits Fits Fits Fits      
Krok, Version C 2090 Krok, Version C Fits Fits Fits Fits Fits Fits Fits      
Krok, Version C 2089 Krok, Version D Fits Fits Fits Fits Fits Fits No fit      
Krok, Version C 1580/1581 Krok, Version E Fits Fits Fits Fits Fits Fits Barely misses      
LACD 1952
2195
LACD   Fits Fits Fits Fits Odd fit        
Lucky Pern AD-10 & AL-15 162/ 165 Lucky Pern AD-10 & AL-15 Fits Fits Fits Fits Fits Fits Fits No fit    
NTR 2014 NTR, Version A Fits Fits Fits Fits Fits Fits Barely misses      
NTR 2324 NTR, Version B   Fits Fits Fits Fits Fits        
Omni USA 201
2198
Omni USA Fits Fits Fits Fits Fits Fits Fits      
2105 Petzl Ascension, Version A   Fits Fits Barely misses            
2031
2183
Petzl Ascension, Version B   Fits Fits Fits No fit          
Petzl Ascension, Version B 43 Petzl Ascension, Version C   Fits Fits Fits Fits No fit        
Petzl Ascension, Versions C1 & C2 296
1902
1906
2043
Petzl Ascension, Versions D1 & D2   Fits Fits Fits Fits Fits        
Petzl Ascension, Versions D1 & D2 1513
1554
1946
Petzl Ascension, Version E1 & E2   Fits Fits Fits Fits Fits        
Petzl Ascension, Versions E1 & E2 44/45
1514
Petzl Ascension, Versions F1 & F2   Fits Fits Fits Fits Fits        
Petzl Ascension, Versions F1 & F2 1507L
1568
1569
2184
Petzl Ascension, Version G   Fits Fits Fits Fits Fits        
Petzl Ascension, Version G 1507R Petzl Ascension, Version H   Fits Fits Fits Fits Fits        
Petzl Ascension, Version H 46
2185
Petzl Ascension, Version I Fits Fits Fits Fits Fits Fits        
Petzl Ascension, Version I 1901 Petzl Ascension, Version J   Fits Fits Fits Fits Fits        
Petzl Ascension, Version J 1571 Petzl Ascension, Version K   Fits Fits Fits Fits Fits        
Petzl Ascension, Version K 169
2054
Petzl Ascension, Version L   Fits Fits Fits Fits Fits        
Petzl Ascension, Version L 266
1900
Petzl Ascension, Version M   Fits Fits Fits Fits Fits        
Petzl Ascension, Version M 264 Petzl Ascension, Version N   Fits Fits Fits Fits Fits        
Petzl Ascension, Version N 127
2186
Petzl Ascension, Version O   Fits Fits Fits Fits Fits        
Petzl Ascension, Version N 298
2112
Petzl Ascension, Version P
(B17SLN, B17SRG)
  Fits Fits Fits Fits No fit        
Petzl Ascension, Version O 2010
2065
Petzl Ascension, Version Q
(B17ALA, B17ARA)
  Fits Fits Fits Fits Fits        
Petzl Ascentree 275
2278
Petzl Ascentree, Version A Fits Fits Fits Fits Fits No fit        
2041 Petzl Ascentree, Version B Fits Fits Fits Fits Fits Fits        
Petzl Ascentree (half) 1536 Petzl Ascentree (half) Fits Fits Fits Fits Fits No fit        
Petzl Pompe, Version A 47
2110
2182
Petzl Pompe, Version A   Fits Fits Fits Fits Fits        
Petzl Pompe, Version B 241
2110
Petzl Pompe, Version B   Fits Fits Fits Fits Fits        
Proverti CD 211 2021 Proverti CD 211 & CD 212 Fits Fits Fits Fits Fits Fits        
Proverti CD 211L 2022 Proverti CD 211L & CD 212L   Fits Fits Fits Fits Fits        
PMI Cat 164
2163
PMI Cat, Version A Fits Fits Fits Fits Fits Fits No fit      
PMI Cat, Version B 2310 PMI Cat, Version B Fits Fits Fits Fits Fits Fits No fit      
PMI Puma 157
2210
PMI Puma Fits Fits Fits Fits Fits Fits Fits      
Rock Empire 1587
2194
Rock Empire   Fits Fits Fits Fits Barely misses        
Roloff 167 Roloff, Version A   Fits Fits No fit            
Roloff 2305 Roloff, Version B   Fits Fits No fit            
2040
2181
Roloff, Version C   Fits Fits No fit            
Roloff (Modified) 2179 Roloff
(Modified, Version A)
  Fits Fits No fit            
Roloff (Modified) 48 Roloff
(Modified, Version B)
  Fits Fits No fit            
Russian, Version A 122 Russian, Version A Fits  Fits Fits Fits Fits Fits        
Russian, Version C 1942 Russian,Version B   Fits Fits Fits Fits No fit        
Russian Interalp 123 Russian Interalp   Fits Fits Fits Fits          
Russian Uola, Version A 2161 Russian Uola, Version A Fits Fits Fits Fits Fits Fits         
Russian Uola 49
2160
Russian Uola, Version B Fits Fits Fits Fits Fits Fits         
Russian Uola, Version C 2162 Russian Uola, Version C Fits Fits Fits Fits Fits Fits         
Singing Rock Lift 2026 Singing Rock Lift Fits Fits Fits Fits Fits Fits Fits      
Single Rope Technique Caver, 8-11 mm 51
2214
Single Rope Technique Caver, 8-11 mm   Fits Fits Fits  Fits          
Single Rope Technique Caver, 8-15mm 52
53
2216
Single Rope Technique Caver, 8-15mm Fits Fits Fits Fits Fits          
Single Rope Technique Climber 50
2215
Single Rope Technique Climber   No fit                
Single Rope Technique A1 Explorer 54
2213
Single Rope Technique A1 Explorer   Fits Fits Fits Fits Fits        
Single Rope Technique A1 EXP 6 Large Explorer 147 Single Rope Technique A1 EXP 6 Large Explorer   Fits Fits Fits Fits No fit        
Single Rope Technique A1 EXP 6 Large Explorer 2217
2218
Single Rope Technique / Rollgliss / DBI Sala A1 EXP 6L & 6R Barely misses Fits Fits Fits Fits No fit        
SOB, Version A 1933
2192
SOB, Version A Fits Fits Fits Fits Fits Fits        
SOB, Version B 2051 SOB, Versions B & C Fits Fits Fits Fits Fits Fits        
Spelet Horní 1941
1953/1954
Spelet Horní   Fits Fits Fits Fits Fits        
Spent Ruční 1956 Spent Ruční   Fits Fits Fits Fits          
Spent Ruční 2626 SUT Fits Fits Fits Fits Fits Fits        
Tokyo Top 2000 Tokyo Top   Fits Fits              
Trango 1991 Trango, Version A   Fits Fits Fits Fits Fits Barely misses      
Trango, Version B 2025 Trango, Version B Fits Fits Fits Fits Fits Fits Barely misses      
Ural-Alp 10.32, Version A 178 Ural-Alp 10.32, Version A   Fits Fits Fits Fits Barely misses        
Unknown Homemade 2058 Unknown Homemade   Fits Fits              
Ural-Alp 10.32, Version A 178 Ural Alp 10.32, Version A Fits Fits Fits Fits Fits Barely misses        
Ural-Alp 10.32, Version B 188 Ural-Alp 10.32, Version B Fits Fits Fits Fits Fits Barely misses        
VauDe, Version A 1992 VauDe, Version A Fits Fits Fits Fits Fits Fits Fits Barely misses    
VauDe, Version B 1993 VauDe, Version B Fits Fits Fits Fits Fits Fits Fits Barely misses    
Vento Ascension 1559/1560 Vento Ascension Fits Fits Fits Fits Fits Fits Fits      
Yates Big Wall 2311 Vertical Fits Fits Fits Fits Fits Fits        
Yates Big Wall 2104 Walkosz i Spółka   Fits Fits Fits Fits Fits        
Yates Big Wall 291
2208
Yates Big Wall Fits Fits Fits Fits Fits Fits Fits      
Yoke 1939
2196
Yoke Fits Fits Fits Fits Fits Fits Barely misses      


Handled Type 1 Lever Cam Ascenders

Black Diamond nForce 219
2106
Black Diamond nForce Fits Fits Fits Fits Fits Fits Fits Fits    
Kong-Bonaiti, Version A 55 Kong-Bonaiti, Version A   Fits Fits Fits Odd fit          
Kong-Bonaiti, Version B 56
1556
Kong-Bonaiti, Version B   Fits Fits Fits Odd fit          
Russian copy of Kong-Bonaiti 58 Russian copy of Kong-Bonaiti Fits Fits Fits Fits Fits Fits Fits Odd fit    


Miscellaneous Ascenders

Ural Alp Handled 120 Ural Alp Handled No fit  Fits Fits Fits Fits No fit        
USHBA Handled 144 USHBA Handled Fits Fits Fits Fits Fits Fits