› Te­kno EB410

Te­kno’s first-ever 1/10 4WD buggy is a high-trac­tion hit

RC Car Action - - CONTENTS - By Joel Navarro

One of the hottest seg­ments in rac­ing to­day is the 4WD 13.5-turn class, so much so that many of the top man­u­fac­tur­ers have catered to this class, step­ping up their 4WD game with new mod­els, in­clud­ing Te­kno with its new EB410. The EB410 is spe­cial be­cause it’s Te­kno’s first of­fer­ing in the 1/10-scale buggy world, and if you think this buggy is just a scaled-down ver­sion of one of its 1/8-scale bug­gies, you would be wrong; the EB410 is brand new from the ground up. The sus­pen­sion is all new and fea­tures 13mm alu­minum big-bore shocks, mono­coque-style sus­pen­sion arms, and plas­tic pill in­ner hingepin mount sys­tem to dial in the arms’ toe and kick-up. A 3mm milled-alu­minum chas­sis fea­tures a weight-for­ward de­sign, which Te­kno en­gi­neers tai­lored to to­day’s high-grip tracks, plac­ing all the electronics for­ward. A low-fric­tion driv­e­train has front/cen­ter/rear oil-filled gear dif­fer­en­tials and uses a mix of steel and alu­minum through­out to keep the ro­tat­ing mass down. The EB410’S list of fea­tures spells suc­cess in any racer’s book, so let’s see how it does on the track.

Re­verse-bell­crank Steer­ing Sys­tem

EB410’S flipped-steer­ing bell­cranks are a first for a 1/10 4WD buggy, and the de­sign frees up a lot of chas­sis space com­pared to con­ven­tional for­ward-fac­ing bell­cranks. This al­lows the steer­ing servo, bat­tery, and speed con­trol to be moved fur­ther to­ward the nose of the car to al­low the for­ward-weight bias Te­kno en­gi­neers were aim­ing for. The steer­ing sys­tem also al­lows you to fully ad­just Ack­er­man as well as bump-steer and toe-in.

3mm Milled-alu­minum Chas­sis

The EB410 isn’t unique for hav­ing a milled chas­sis, but it does set it­self apart with the place­ment of the electronics. Tak­ing into con­sid­er­a­tion the high trac­tion avail­able at to­day’s tracks, most of the weight is placed for­ward for a bal­anced feel. Up top, you’ll find a pair of rear chas­sis braces; you can use one or both to fine-tune rear flex. The front brace stiff­ens up the front flex, but you can re­move screws to in­crease or de­crease flex. The mo­tor is held se­curely in place with an alu­minum slider–type mo­tor mount that’s eas­ily ac­ces­si­ble and al­lows you to set the gear mesh quickly and ac­cu­rately.

Low-fric­tion Shaft Driv­e­train

Fric­tion and drag from a driv­e­train is a car’s worst en­emy, es­pe­cially when run­ning 17.5 and 13.5 stock mo­tors. Te­kno adopted cen­ter driveshaft tech from its 1/8 ve­hi­cles and in­te­grated it into the EB410. The drive­shafts that run from the cen­ter dif­fer­en­tial to the front and rear gear­boxes are per­fectly in line, which dra­mat­i­cally re­duces the amount of drag com­pared to other cars with an­gled drive­shafts. The rest of the driv­e­train uses front, cen­ter, and rear gear oil­filled dif­fer­en­tials. Steel CV drive­shafts are used to de­liver the power to the wheels, while alu­minum cen­ter drive­shafts are used to re­duce ro­tat­ing mass. Rub­ber-shielded ball bear­ings are used through­out to keep ev­ery­thing rolling free.

Race-ready Sus­pen­sion

Most off-road ve­hi­cles have sus­pen­sion arms that are molded with open spa­ces be­tween their ribs and gus­sets, but Te­kno’s arms have no open­ings other than the holes for the hingepins and droop screws. Threaded-alu­minum 13mm big-bore shocks al­low for easy ride-height changes. Lock­ing spring perches keep the shock springs locked firmly in place and pre­vent the spring perch from be­ing lost. Chang­ing the toe or kick-up ad­just­ment on the arms is quickly done thanks to user-friendly alu­minum in­ner hingepin mounts that use plas­tic in­serts to dial in set­tings.

Plac­ing the steer­ing bell­cranks on the front gear­box ver­sus the chas­sis frees up a lot of space on the chas­sis, al­low­ing the electronics to be placed more for­ward. The steer­ing bell­cranks ride on ball bear­ings, pro­vid­ing silky smooth ac­tion.

The 3mm alu­minum chas­sis is strong and milled out to make it ul­tra light­weight. 47

The slider-type mo­tor mount is held se­curely in place with two eas­ily ac­ces­si­ble screws, al­low­ing you to pre­cisely set the gear mesh.


The 13mm shocks’ threadeda­lu­minum bod­ies al­low for quick ride-height changes, and lock­ing spring perches keep the spring and perch firmly in place.

Steel drive­shafts de­liver the power to the wheels. They use cap­tured pins held in place with the ball bear­ings in the rear hubs and front steer­ing knuck­les.

Mono­coque-style front and rear sus­pen­sion arms help re­duce flex un­der load and in­crease dura­bil­ity.

Oil-filled gear dif­fer­en­tials are used on the front, cen­ter, and rear ends of the EB410. I la­beled my front and rear diffs, which con­tain dif­fer­en­tweight oils.

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